Hadith No: 1
Al-Dhahabi - Siyar A'lam al-Nubala' - Volume 15 - Al-Muntadhar
Part: (13) - Page Number: (120)
[The text is lengthy, so only the relevant excerpt is provided here]
- Al-Muntadhar al-Sharif Muhammad ibn al-Hasan al-Askari ibn Ali al-Hadi ibn Muhammad al-Jawad ibn Ali al-Ridha ibn Musa al-Kazim ibn Ja'far al-Sadiq ibn Muhammad al-Baqir ibn Zayn al-Abidin Ali ibn al-Husayn al-Shahid ibn al-Imam Ali ibn Abi Talib al-Husayni, the Seal of the Twelve Lords.

---

Reference: Seyar A'laam al-Nobalaa Book 13

Hadith No: 2
Al-Dhahabi - Tarikh al-Islam wa Wafat al-Mashahir wa'l-A'lam
Volume 27, 261 :: 270 AH - Biographies of the People of This Class - Letter M
401 - Muhammad ibn al-Hasan al-Askari ibn Ali al-Hadi ibn Muhammad al-Jawad ibn Ali al-Ridha ibn Musa al-Kazim, Abu al-Qasim al-Alawi al-Hasani (peace be upon him)
Part: (6) - Page Number: (398)
[The text is lengthy, so only the relevant excerpt is provided here]
401 - Muhammad ibn al-Hasan al-Askari ibn Ali al-Hadi ibn Muhammad al-Jawad ibn Ali al-Ridha ibn Musa al-Kazim, Abu al-Qasim al-Alawi al-Hasani [Death: 261 :: 270 AH] the Seal of the Twelve Imams of the Shia and the Awaited One of the Rafidah, whom they claim is the Mahdi, the Master of Time, the Awaited Proof, and the one in charge of the cistern in Samarra. They have been waiting for his appearance for four hundred and fifty years, claiming that he entered a cistern in the house of his father and mother, who are watching for him, but he did not come out of it, and to this day he remains in the cistern, having disappeared when he was nine years old...

---

Reference: Taarikh al islaam wa wafyaat al mushaheer wal a'alaam Book 6

Hadith No: 3
Ibn Khalkan - Wafayat al-A'yān wa Anbā' Abnā' az-Zamān - Letter M - Abū al-Qāsim al-Muntazar
Volume: (4) - Page Number: (176)
562 - Abū al-Qāsim al-Muntazar, Abū al-Qāsim Muhammad ibn al-Hasan al-Mahdī al-‘Askarī ibn al-‘Alī al-Hādī ibn Muhammad al-Tawwārih mentioned earlier, the Twelfth of the Twelve Imams according to the belief of the Imāmites, known as al-Hujjah. He is regarded by the Shi'a as the one who is Awaited, the Upright, and the Guided One (al-Mahdī). He is the Master of the Qaṭīf (Sardab) among them, and there are many sayings about him. They are awaiting his appearance at the end of times from the Qaṭīf (Sardab) in Sāmarrā. He was born on Friday, the 15th of Sha'bān in the year 255 AH (Islamic year), and when his father passed away, as mentioned earlier, he was five years old. His mother's name was Khammāṭ, although some say it was Narjis. The Shi'a believe that he entered the Qaṭīf (Sardab) in his father's house while his mother was watching him, and he did not return to her. This occurred in the year 265 AH (Islamic year), when he was nine years old. Ibn al-Azraq mentioned in his Tarikh (History) of Mīāfārqīn that the aforementioned al-Hujjah was born on the 9th of Rabī' al-Awwal in the year 258 AH (Islamic year), while others say it was on the 8th of Sha'bān in 256 AH, with the latter being the more accurate. It is said that when he entered the Qaṭīf (Sardab), he was four years old, while some say five years old. Others state that he entered the Qaṭīf (Sardab) in the year 275 AH (Islamic year) at the age of seventeen. And Allah knows best which of these is correct (r).

---

Reference: Wafayaat al-Aayaan Wa Abnaae Abnaaiz Zamaan Book 4

Hadith No: 4
Khayr al-Din al-Zurqili - Al-A'lam
Letter M - Meem - al-Mahdi al-Muntazar - (256 :: 275 AH = 870 - 888 CE)
Volume: (6) - Page Number: (80)
[The text is lengthy, so only the relevant excerpt is provided here]
- Muhammad ibn al-Hasan al-Askari al-Khalis ibn Ali al-Hadi Abu al-Qasim, the last of the twelve Imams according to the Twelver Shiites, is known to them as the Mahdi, the Master of Time, the Awaited One, the Proof (Hujjah), and the inhabitant of the cellar. He was born in Samarra, and his father died when he was about five years old. When he turned nine, ten, or nineteen, he entered a cellar in his father's house and did not leave it. Ibn Khalkan said: The Shiites await his appearance at the end of times from the cellar in Samarra. It is said that he was born on the night of the middle of Sha'ban in the year 255, and that he went into occultation in the year 265. Among historians (as mentioned in Minhaj al-Sunnah), there are those who believe that al-Hasan ibn Ali al-Askari had no descendants. In Safinat al-Bihar by al-Qummi, a description of the night of his birth and his mother's name (Narjis) is given, along with the information that he was forbidden to be named after himself, so they refer to him with the title of the Mahdi or one of his other epithets.

---

Reference: al'Aelam Book 6

Hadith No: 5
Ibn al-Athir - al-Kamil fi al-Tarikh - Then the year 260 entered
Volume: (6) - Page Number: (320)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... In it, Hasan ibn Ali ibn Muhammad ibn Ali ibn Musa ibn Ja'far ibn Muhammad ibn Ali ibn al-Husayn ibn Ali ibn Abi Talib (peace be upon him) died, and he was Abu Muhammad al-Alawi al-Askari, one of the twelve imams according to the Twelver Shia faith. He is the father of Muhammad, whom they believe to be the Awaited One (al-Mahdi) in the cellar of Samarra. He was born in the year 232.

---

Reference: Al-Kamil Fi Tarikh Book 6

Hadith No: 6
Al-‘Allamah al-Shublanjī - Nūr al-Abṣār - al-Shu'ūbiyyah Edition
Volume: (1) - Page Number: (168)
[The text is lengthy, so only the relevant excerpt is provided here]
- Chapter: On the Virtues of Muhammad ibn al-Ḥasan al-Khālis ibn ʿAlī al-Hādī ibn Muḥammad al-Jawād ibn ʿAlī al-Riḍā ibn Mūsā al-Kāzim ibn Jaʿfar al-Ṣādiq ibn Muḥammad al-Bāqir ibn ʿAlī Zayn al-ʿĀbidīn ibn al-Ḥusayn ibn ʿAlī ibn Abī Ṭālib (may Allah be pleased with him). His mother was a concubine named Nargis, although she was also called Suqayl or Sawsan. His kunya was Abu al-Qāsim, and the Imāmites referred to him as al-Ḥujjah, al-Mahdī, al-Khalaf al-Ṣāliḥ, al-Qā'im, al-Muntazar, and Ṣāḥib al-Zamān. The most commonly known title is al-Mahdī. His (peace be upon him) description is that of a young man of medium stature, with a handsome face and hair. His hair flows over his shoulders, he has a hooked nose, and a bald forehead. His deputy was Muhammad ibn ʿUthmān, his contemporary, whom he relied upon. Thus it is stated in al-Fuṣūl al-Muhimmah fī Maʿrifat Aḥwāl al-Imāmah. He is the last of the twelve Imāms, according to what the Imāmites believe, until it is said: And in the Tarikh of Ibn al-Wurdi: Muhammad ibn al-Ḥasan al-Khālis was born in the year 255 AH. The Shiites claim that he entered the sarcophagus in his father's house in Samarra while his mother watched him, and he did not return to her. He was nine years old at the time, which was in the year 265 AH, although there are differing accounts.

---

Reference: Noor al-Absaar Book 1

Hadith No: 7
Al-Qanduzi al-Hanafi - Yanabi' al-Mawadda li Dhawi al-Qurbaa
Volume: (3) - Page Number: (306)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And Al-Hasan returned to his home and passed away (may Allah be pleased with him), and it is said that he died from poison and he left behind no one except his son Abu al-Qasim Muhammad al-Hujjah, who was five years old at the time of his father's death, but Allah, the Exalted, granted him wisdom, and he is called al-Qa'im al-Muntazar (the Awaited Rising), because he was concealed and hidden, so it was not known where he had gone .... The known and established report among trustworthy sources is that the birth of al-Qa'im (peace be upon him) occurred on the night of the fifteenth of Shaban in the year 255 AH in the town of Samarra, near the smaller Qur'an that was in the bow, and he was the fourth of the larger Qur'an that was also in the bow. The ascendant was in the twenty-fifth degree of Cancer.

---

Reference: Yanabie Almawadat Lidhuyi Alqurbaa Book 3