Hadith No: 1
Ibn Hajar al-Asqalani - Fath al-Bari Sharh Sahih al-Bukhari - Book of the Virtues of the Companions
Chapter on the Prophet's (peace be upon him and his holy progeny) statement: "If I were to take a khaleel (intimate friend), I would take Abu Bakr as a khaleel"
Volume: (7) - Page Number: (34)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... (Benefit): Abu Bakr (may Allah be pleased with him) died from an illness of tuberculosis, as stated by al-Zubair ibn Bakkar, and according to al-Waqidi, he bathed on a cold day and had a fever for fifteen days. It is also said that the Jews rather poisoned him in a harira (a type of soup) or something else, which is more accurate. He passed away eight days before the end of Jumada al-Thani in the year thirteen of the Hijrah, making his caliphate last two years, three months, and a few days, although some say otherwise.

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Reference: Fath al-Baari fi Sharh Saheeh al-Bukhari Book 7

Hadith No: 2
Ibn Hajar al-Asqalani - Al-Isabah fi Tamyiz al-Sahabah - Supplement to the Letter 'Ayn (ع) Ghayr Maqru'ah
Supplement to the First Part of the Letter 'Ayn - Continuation of 'Ayn Followed by Ba' (ب) - Mention of Those Named Abdullah
4835 - Abdullah ibn Uthman ibn Amir
Volume: (4) - Page Number: (149/150)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And Ibn Sa'd mentioned from the narration of al-Zuhri that Abu Bakr and al-Harith ibn Kaladah ate a haseeerah (a type of dish) that was gifted to Abu Bakr, and al-Harith was a physician. He then said to Abu Bakr, "Raise your hand, by Allah, there is poison in it." They remained ill until they both died at the end of the year, on the same day."

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Reference: Al-Isaabah Fi Tamyeez al-Sahaabah Book 4

Hadith No: 3
Ibn Hajar al-Asqalani - Tahdhib al-Tahdhib - Letter 'Ayn (غ) - Those Whose Name is Abdullah
Volume: (5) - Page Number: (315 > 317)
[The text is lengthy, so only the relevant excerpt is provided here]
537 - Abdullah ibn Uthman ibn Amir ibn Amr ibn Kab ibn Sa'd ibn Taym ibn Murra al-Taymi, Abu Bakr al-Siddiq al-Akbar ibn Abi Quhafa.... Ibn Sa'd mentioned from Ibn Shuhab that Abu Bakr and al-Harith ibn Kuldah ate harirah that had been gifted to Abu Bakr, and al-Harith, who was a physician, said, "Raise your hand, by God there is poison in it." They remained unwell until they died at the end of the year on the same day." His biography will appear in a short volume in the history of Ibn Asakir.

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Reference: Tazheeb al Tahzeeb Book 5

Hadith No: 4
Al-Hakim al-Nisapuri - al-Mustadrak ala al-Sahihain
Book of Maghazis and Sirayas - Allah made him a Prophet and made him a martyr
Volume: (3) - Page Number: (59)
4451 - Abu Bakr Ahmad ibn Muhammad al-Maruzi narrated to us multiple times, saying: Abd al-Samad ibn al-Fadl al-Balkhi narrated to us, saying: Makki ibn Ibrahim narrated to us, saying: Dawud ibn Yazid al-Awdi narrated, who said: I heard al-Shabi say: "By Allah, the Messenger of Allah (peace be upon him and his holy progeny) was indeed poisoned, and Abu Bakr al-Siddiq was poisoned," and Umar ibn al-Khattab was killed by strangulation, and Uthman ibn Affan was killed by strangulation, and Ali ibn Abi Talib was killed by strangulation, and al-Hasan ibn Ali was poisoned, and al-Husayn ibn Ali was killed by strangulation (may peace be upon them). What do we hope for after them?

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Reference: Al-Mustadarak ala al-Saheehain Book 3

Hadith No: 5
Al-Hakim al-Nisaburi - Al-Mustadrak ala al-Sahihain
Book of Knowledge of the Companions - The Death of Abu Bakr was from Poison
Volume: (3) - Page Number: (64)
4467 - Al-Usul al-Naqib Abu al-Walid narrated to me, saying: Abdullah ibn Sulayman ibn al-Ash'ath narrated to us, saying: Abd al-Malik ibn Shu'ayb ibn al-Layth narrated to me, from my father, from my grandfather, from Aqil, from Ibn Shihab: that one day a man presented Abu Bakr (may Allah be pleased with him) with a dish of khazirah (a type of meat and bread stew), and there was a man with him named al-Harith ibn Kulaydah, who had knowledge. When they had both eaten from it, Ibn Kulaydah said: "There is poison in it, intended for the year." By the One in whose hand is my soul, not a year would pass before they both died on the same day, the beginning of the year."

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Reference: Al-Mustadarak ala al-Saheehain Book 3

Hadith No: 6
Al-Hakim al-Naysaburi - Al-Mustadrak 'ala al-Sahihain
Book of Knowledge of the Companions - The Death of Abu Bakr was from Poison
Volume: (3) - Page Number: (64)
4468 - Abu Bakr ibn Muhammad al-Sayarafi mentioned to me in Marv, saying: Abd al-Samad ibn al-Fadl narrated to us, saying: Makki ibn Ibrahim narrated to us, saying: al-Sari ibn Isma'il narrated to us, from al-Sha'bi, who said: What can one expect from this lowly world, when the Messenger of Allah (peace be upon him and his holy progeny) was poisoned and Abu Bakr al-Siddiq was also poisoned, and Umar ibn al-Khattab was killed by a fatal blow, and likewise, Uthman and Ali were killed, and al-Hasan was poisoned, and al-Husayn was killed by a fatal blow.

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Reference: Al-Mustadarak ala al-Saheehain Book 3

Hadith No: 7
Ibn Sa'd - al-Tabaqat al-Kubra - The Statement on the First Class, namely the Badrians among the Emigrants and the Helpers
Classes of the Badrians among the Emigrants - And from Banu Taym ibn Murrah ibn Kab ibn Sa'd - 46: Abu Bakr al-Siddiq.
Volume: (3) - Page Number: (148)
- He said: Abdul Aziz ibn Abd Allah al-Awusi narrated to us, saying: Layth ibn Sa'd narrated to me from Aqil from Ibn Shihab that Abu Bakr and al-Harith ibn Kuldayah were eating khazirah that had been presented to Abu Bakr. Al-Harith said to Abu Bakr, "Raise your hand, O Khalifah of the Messenger of Allah! By Allah, there is indeed a sign of a year in it, and you and I will die on the same day." Abu Bakr then raised his hand, and they remained unwell until they both died on the same day at the end of the year.

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Reference: Al-Tabaqaat al-Kubra Book 3

Hadith No: 8
Ibn al-Athir - Al-Kamil fi al-Tarikh - Then the year thirteen entered - Mentioning the death of Abu Bakr
Volume: (2) - Page Number: (262)
[The text is lengthy, so only the relevant excerpt is provided here]
- Abu Bakr's (may Allah be pleased with him) death was eight nights remaining in Jumada al-Thaniya, on the night of Tuesday, at the age of sixty-three, which is the correct account. It is said otherwise as well. He had been poisoned by the Jews in either flour or a thin soup, known as al-haswu. Both he and al-Harith ibn Kalda ate it, but al-Harith stopped eating and said to Abu Bakr: "We have eaten food that is poisoned, a poison of the year."...

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Reference: Al-Kamil Fi Tarikh Book 2

Hadith No: 9
Ibn al-Athir - Asad al-Ghabah fi Ma'rifat al-Sahabah - Letter 'Ayn
Chapter on 'Ayn and Ba' - 3066: Abdullah ibn Uthman Abu Bakr al-Siddiq - His Death
Volume: (3) - Page Number: (324)
[The text is lengthy, so only the relevant excerpt is provided here]
846 - My father narrated to us; he said: Abu Bakr al-Farzi narrated to us; he said: Abu Muhammad al-Juhari narrated to us; he said: Abu Umar ibn Hayat narrated to us; he said: Ahmad ibn Ma'ruf narrated to us; he said: al-Husayn ibn al-Fahm narrated to us; who said: Muhammad ibn Sa'd narrated to us; Abd al-Aziz ibn Abdullah al-Awsi narrated to me; from Layth ibn Sa'd, from Aqil from Ibn Shihab, that Abu Bakr and al-Harith ibn Kulaydah were eating a dish of khazirah that had been gifted to Abu Bakr. Al-Harith said: "Lift your hand, O Caliph of the Messenger of Allah! By God, there is a lethal poison in it, and you and I will die on the same day." So he lifted his hand, and they remained in poor health until they both died on the same day at the end of the year.

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Reference: Osad al-Ghabah fi Ma'refah al-Shahabah Book 3

Hadith No: 10
Ibn al-Atheer - Al-Kh Mullabaar fi Aakhbaar al-Khalq
Chapter Six Islamic History - Death of Abu Bakr (ra)
Volume: (1) - Page Number: (158/159)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And there was a disagreement regarding the cause of his death. It was said that the Jews poisoned him in rice, and some said in a broth. He and al-Harith ibn Kulayd ate it, and al-Harith said, "We have eaten poisoned food; we will die in a year." They both died a year later.

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Reference: Al Mukhtasar fi Akhbaar Al Bashar Book 1

Hadith No: 11
Al-Muttaqi al-Hindi - Kanz al-'Ummal fi Sunan al-Aqwal wal-Af'al
Volume: (12) - Page Number: (537/538)
35726 - Ibn Shahab narrated that Abu Bakr and al-Harith ibn Kulaydah were eating a dish called khazirah that had been gifted to Abu Bakr. Al-Harith said to Abu Bakr: "Raise your hand, O Khalifah of the Messenger of Allah (peace be upon him and his holy progeny). By Allah, there is certainly poison in it, and you and I will die on the same day." So he raised his hand, and they remained unwell until they both died on the same day at the end of the year. Ibn Sa'd, Ibn al-Sunni, and Abu Nu'aym mentioned this together in al-Tibb. Ibn Kathir said: "Its chain of narrators is authentic to al-Zuhri," and he added, "and his Mursalat in such cases are of the highest degree."

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Reference: Kanz al-Ummaal fi Sunan al-Aqwaal wa al-Af'aal Book 12

Hadith No: 12
Ibn Qutaybah - al-Ma'arif - The Accounts of Abu Bakr al-Siddiq (ra) - The Pledge of Abu Bakr and His Caliphate and Death
Volume: (1) - Page Number: (170)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And they differed regarding the cause of the illness from which he died and the day on which he died. Abu al-Yaqzan reported from Salam ibn Abi Mut'i that he was poisoned and died on Monday, in the latter part of the day.

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Reference: Al Maarif Book 1

Hadith No: 13
Al-Tabari - al-Riyad al-Nadira fi Manaqib al-Ashara - Volume Two: On the Virtues of Individuals
Chapter One: On the Virtues of the Caliph of the Messenger of Allah, Abu Bakr al-Siddiq
Section Fourteen: Mentioning His Death and Related Matters
Volume: (1) - Page Number: (259)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And Ibn Shahab said: Abu Bakr and al-Harith ibn Kalda were eating a harira that was gifted to Abu Bakr when al-Harith said to Abu Bakr: "Raise your hand, O Caliph of the Messenger of Allah (peace be upon him and his holy progeny), for there is poison in it, and both you and I will die on the same day." So he raised his hand, and they remained unwell until they both died on the same day at the end of the year. He recorded this in al-Safwa and al-Fada'il, and the one in charge of al-Dura al-Thamina in Akhbar al-Madina added: "He was ill for fifteen days and said: 'He has seen me.'" They said: "What did he say to you?" He replied: "I will do as I wish." And it was said that the Jews poisoned him with a morsel.

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Reference: Ar Riyaz an Nasarah fi manaqib al ashar Book 1

Hadith No: 14
Al-Tabari - Tarikh al-Tabari - Year Thirteen - Mention of the Illness and Death of Abu Bakr
Volume: (3) - Page Number: (419)
[The text is lengthy, so only the relevant excerpt is provided here]
- Abu Zayd narrated to me from Ali ibn Muhammad with his chain of narration that has already been mentioned, who said: Abu Bakr died at the age of sixty-three years on a Monday in the month of Jumada al-Thani, with eight days remaining in it. They said that the cause of his death was that the Jews poisoned him in a cedar tree, and it is said in a bundle of twigs. Al-Harith ibn Kulayd also took some of it and then stopped. He said to Abu Bakr: "You have eaten poisoned food; you will die in a year," and he died after a year, having been ill for fifteen days. It was said to him: "Would you not send for a doctor?" He replied: "He has already seen me." They asked: "What did he say to you?" He said: "I will do what I wish." Abu Ja'far said: `Uttab ibn Asid died in Mecca on the same day that Abu Bakr died, and they were both poisoned. Then 'Uttab died in Mecca.

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Reference: Taarikh al-Tabari Book 3

Hadith No: 15
Al-Dhahabi - Tarikh al-Islam wa Wafat al-Mashahir wal-A'lam
Volume 3: The Era of the Rightly Guided Caliphs
Year Thirteen - Those Who Died in This Year Alphabetically - Abu Bakr al-Siddiq
Part: (3) - Page Number: (115)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And Aqil reported from al-Zuhri that Abu Bakr and al-Harith ibn Kulthum were eating a dish of khayziran (a type of food) that had been gifted to Abu Bakr. Al-Harith said, "Raise your hand, O Khalifah of the Messenger of Allah! By Allah, there is certainly a poisonous herb in it, and you and I will die on the same day." He said that they remained unwell until they both died on the same day when the year came to an end.

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Reference: Taarikh al islaam wa wafyaat al mushaheer wal a'alaam Book 3

Hadith No: 16
Al-Ayni - Umdat al-Qari Sharh Sahih al-Bukhari - Book of Funerals - Chapter on Death on Monday
Volume: (8) - Page Number: (219)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And it was said, "Poison." Then Ibn Sa'd mentioned with his chain of narrators from Ibn Shihab: "That Abu Bakr and al-Harith ibn Khaldah were eating a porridge that had been gifted to Abu Bakr, and al-Harith said to him, 'Raise your hand, O successor of the Messenger of Allah! By Allah, there is poison in it. A year will pass, and you and I will die on the same day when the year is complete.'" And they both died when the year was up, and they remained unwell until they died. The porridge is made by cutting meat and sprinkling flour over it.
- .... And al-Tabari said that what a woman from the Jews poisoned him with was rice.
- .... And it was said that the Jews poisoned him with a drink.

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Reference: Umdat alqari Sharh Saheeh albukhari Book 8

Hadith No: 17
Ibn Asakir - Tarikh Damishq (History of Damascus) - Letter 'Ayn
3398 - Abdullah, also known as Atiq ibn Uthman ibn Qahafa ibn Amir ibn Amr ibn Kab ibn Sa'id ...
Volume: (30) - Page Number: (408/409)
[The text is lengthy, so only the relevant excerpt is provided here]
- Abu Bakr al-Fardhi narrated to us, saying that Abu Muhammad al-Jawhari narrated to him, that Abu Umar ibn Hayyuwiya narrated to him, that Ahmad ibn Ma'ruf narrated to him, that al-Husayn ibn al-Fahm narrated to us, that Muhammad ibn Sa'd narrated to him, that Abd al-Aziz ibn Abdullah al-Awsi narrated to him, who said: Al-Layth ibn Sa'd narrated to me, from Aqil from Ibn Shihab, that Abu Bakr and al-Harith ibn Kuldah were eating a broth (khazira) that had been gifted to Abu Bakr. Al-Harith said to Abu Bakr: "Raise your hand, O Khalifah of the Messenger of Allah (peace be upon him and his holy progeny). By God, there is poison in it, and you and I will die on the same day." So he raised his hand, and they remained in poor health until they both died on the same day, at the end of the year."

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Reference: Tarikh e Damishq Book 30

Hadith No: 18
Al-Suyuti - Tarikh al-Khulafa - The First Caliph: Abu Bakr al-Siddiq (may he rest in peace)
Chapter on His Illness, Death, Will, and Appointment of Umar
Volume: (1) - Page Number: (65)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... Ibn Sa'd and al-Hakim narrated with a sound chain from Ibn Shahab that Abu Bakr and al-Harith ibn Kuldhah were eating a porridge that had been gifted to Abu Bakr. Al-Harith said to Abu Bakr: "Lift your hand, O Caliph of the Messenger of Allah! By Allah, there is poison in it, and you and I will die on the same day." So he lifted his hand, and they remained unwell until they both died on the same day at the end of the year."
- .... Al-Hakim narrated from al-Sha'bi, who said: "What do we expect from this lowly world, when the Messenger of Allah (peace be upon him and his holy progeny) was poisoned, and Abu Bakr was poisoned as well."

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Reference: Tarikh al Khulafah Book 1

Hadith No: 19
Ibn al-Jawzi - Sifat al-Safwa
Mentioning the well-known for knowledge, asceticism, and devotion among the companions of the Messenger of Allah (peace be upon him and his holy progeny) - Abu Bakr al-Siddiq (may Allah be pleased with him)
Volume: (1) - Page Number: (99)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And Ibn Hisham narrated that Abu Bakr and al-Harith ibn Kuldayah were eating a harirah (a type of soup) that had been gifted to Abu Bakr, and al-Harith said to Abu Bakr: "Raise your hand, O Khalifah of the Messenger of Allah! By Allah, there is certainly a sign of prophecy in it, and you and I will die on the same day." So he raised his hand, and they remained in ill health until they both died on the same day at the end of the year....

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Reference: Safatal Sufoot Book 1

Hadith No: 20
Al-Mas'udi - Muruj al-Dhahab wa Ma'aden al-Jawhar - Mentioning the Caliphate of Abu Bakr al-Siddiq - His Affliction
Volume: (1) - Page Number: (290)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And the Jews had poisoned Abu Bakr (may he be pleased with him) with something in food, and al-Harith ibn Kulthum ate with him and went blind, and the poisoning took effect after a year, and Abu Bakr fell ill fifteen days before his death.

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Reference: Murooj az zahab wa Maadan Jauhar Book 1

Hadith No: 21
Al-Ṣāliḥī al-Shāmī - Subul al-Hudá wa al-Rashád fī Sīrat Khayr al-'Ibād
The Summary of the Chapters Mentioning the Ten Who Were Witnessed to Paradise by the Messenger of Allah (peace be upon him and his holy progeny) and Some of Their Virtues
Chapter Seven: Regarding Some of the Virtues of the Commander of the Faithful, Abū Bakr al-Ṣiddīq (may Allah be pleased with him), in a Solemn Manner
Seventh: Concerning His Illness and Death and Mentioning Some of the Elegies Recited for Him
Volume: (11) - Page Number: (260)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... Al-Hakim narrated from al-Shu'bī who said: What can be expected from this lowly world when the Messenger of Allah (peace be upon him and his holy progeny) was marked, and Abū Bakr was marked?

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Reference: Sobol al-Huda wa al-Rashaad fi Seerah Khair al-'Ibaad Book 11

Hadith No: 22
Al-Mubarakfuri - Tuhfat al-Ahwathi bi Sharh Jami' al-Tirmidhi
Book of Menaqib - Chapter on the Virtues of Abu Bakr al-Siddiq (ra)
Volume: (10) - Page Number: (96)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And it is said that the Jews actually poisoned him in a thin soup or something similar, and this is the more accurate account, as he died eight days later in Jumada al-Thani in the year thirteen of the Hijra. Thus, his caliphate lasted two years, three months, and a few days, though some say otherwise. It is unanimously agreed that he completed the age of the Prophet (peace be upon him and his holy progeny), dying at the age of sixty-three, and Allah knows best.

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Reference: Tuhfat al'Uhwdhi biSharh Jame al-Tarmidhi Book 10