Hadith No: 1
Ibn Abi Shaiba - Al-Kitab al-Musannaf fi al-Ahadith wa al-Athar
Book of Adhan and Iqamah - He says in his Adhan, "Hayya ala khayr al-'amal" (Hasten to the best of deeds)
Volume: (1) - Page Number: (244)
1 - Abu Bakr narrated to us, saying: Hatem ibn Isma'il narrated to us, from Ja'far, from his father, and Muslim ibn Abi Maryam, that Ali ibn Husayn used to call the Adhan, and when he reached "Hayya ala al-falah" (Hasten to success), he would say, "Hayya ala khayr al-'amal," and he would say that it was the first Adhan.
3 - Abu Usamah narrated to us, saying: Ubaydullah narrated to us, from Nafi', who said that Ibn Umar added "Hayya ala khayr al-'amal" to his Adhan.

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Reference: Al-Musannaf Book 1

Hadith No: 2
Al-Bayhaqi - Sunan al-Kubra - Book of Prayer
The Compilation of Chapters on Timings - Chapter on What Was Narrated About "Hayya 'ala Khayr al-'Amal"
Volume: (1) - Page Number: (424)
1919 - Abu Abdullah al-Hafiz and Abu Sa'id ibn Abi Umr both narrated to us, saying: Abu al-Abbas Muhammad ibn Ya'qub narrated to us, saying: Yahya ibn Abi Talib narrated to us, saying: Abd al-Wahhab ibn Ata narrated to us, saying: Malik ibn Anas narrated from Nafi', who said: Ibn Umar would say the Takbir three times in the call to prayer and would witness (the prayer) three times. Sometimes, when he said "Hayya 'ala al-Falah," he would, immediately after it, say "Hayya 'ala Khayr al-'Amal." Abdullah ibn Umar narrated from Nafi' that Ibn Umar would sometimes add to his adhan: "Hayya 'ala Khayr al-'Amal."

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Reference: Al-Sunan al-Kubra Book 1

Hadith No: 3
Al-Bayhaqi - Sunan al-Kubra - Book of Prayer
Compilation of Chapters on Timings - Chapter on What Was Narrated About "Hayya 'ala Khayr al-Amal"
Volume: (1) - Page Number: (424)
1920 - And Al-Layth ibn Sa'd narrated it from Nafi' as Abu Abdillah al-Hafiz informed us: Abu Bakr ibn Ishaq narrated to us, saying: Bishr ibn Musa narrated to us, saying: Musa ibn Dawud narrated to us, from Al-Layth ibn Sa'd from Nafi', who said: Ibn Umar would not have the call to prayer (adhan) made during his travels, and he would say: "Hayya 'ala al-falah" (Come to success), and sometimes he would say: "Hayya 'ala Khayr al-Amal" (Come to the best of actions)." And Muhammad ibn Sirin narrated from Ibn Umar that he would say this in his adhan, and Nasir ibn Dhalluq narrated it similarly from Ibn Amr, saying: in travel. And this was also reported from Abu Umamah.

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Reference: Al-Sunan al-Kubra Book 1

Hadith No: 4
Al-Bayhaqi - al-Sunan al-Kubra - Book of Prayer
Summary of the Chapters on Timings - Chapter on What Was Narrated About "Hayya 'ala Khayr al-'Amal"
Volume: (1) - Page Number: (424)
1921 - Muhammad ibn Abdullah al-Hafiz narrated to us, saying: Abu Bakr ibn Ishaq narrated to us, saying: Bashar ibn Musa narrated to us, saying: Musa ibn Dawud narrated to us, saying: Hatim ibn Isma'il narrated to us from Ja'far ibn Muhammad from his father, that Ali ibn al-Husayn used to say in his call to prayer (adhan) when he said, "Hayya 'ala al-Falah" (Hasten to Success), he would say, "Hayya 'ala Khayr al-'Amal" (Hasten to the Best of Deeds), and he would say that it is the first adhan.

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Reference: Al-Sunan al-Kubra Book 1

Hadith No: 5
Al-San'ani - al-Mustanif - Book of Prayer - Chapter on the Beginning of the Adhan
Volume: (1) - Page Number: (464)
1797 - Abd al-Razzaq narrating from Ibn Jurayj, from Nafi, from Ibn Umar, that he used to call the iqamah for prayer while traveling, saying it twice - or three times - saying: "Hasten to prayer, hasten to prayer, hasten to the best of deeds."

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Reference: Al-Musannaf Book 1

Hadith No: 6
Ibn Hazm - Al-Muhalla bil-Athar - Book of Prayer - Chapter on the Adhan - Issue on the Description of the Adhan
Volume: (2) - Page Number: (194)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... It has been authentically reported from Ibn Umar and Abu Umamah ibn Sahil ibn Hunayf that they used to say in their Adhan: "Hayya 'ala khayr al-'amal" (Hasten to the best of deeds), but we do not endorse this because it was not authentically reported from the Prophet (peace be upon him and his holy progeny), and there is no evidence in the actions of anyone below him. Indeed, it would be necessary for anyone who makes such a statement about a Companion to adhere to a similar position, as this cannot be said based on personal opinion: to follow Ibn Umar's view in this matter, which is firmly established from him through the most reliable chain of transmission.

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Reference: Al-Mahalli bi al-Aathaar Book 2

Hadith No: 7
Ibn Hazm - al-Ihkam fi Usul al-Ahkam
Chapter Twenty-Two: On Consensus (Ijma') and What It Can Be Based On, and How Consensus Is Transferred
Section on Refuting the Statement of Those Who Say Consensus Is the Consensus of the People of Medina
Volume: (4) - Page Number: (212)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... and with this up to Abd al-Razzaq from Ma'mar from Yahya ibn Abi Kathir from a man from Ibn Umar that he used to say when he uttered in the call to prayer (adhan): "Hasten to success" (Hayya 'ala al-falah), "Hasten to the best of deeds" (Hayya 'ala khayr al-'amal)."

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Reference: Al'iihkam Fi 'Usul Al'ahkam Book 4

Hadith No: 8
Al-Ziyali - Nasb al-Rayah fi Takhreej Ahadith al-Hidayah - Book of Prayer - Chapter on the Call to Prayer (Adhan)
Volume: (1) - Page Number: (291)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... Al-Bayhaqi also narrated from Abd al-Wahhab ibn Ata, who said: Malik ibn Anas narrated to us from Nafi, who said: Ibn Umar would sometimes say, when he stated, "Hasten to success" (Hayya ala al-falah), immediately thereafter, "Hasten to the best of deeds" (Hayya ala khair al-amal)." He then narrated from al-Layth ibn Sa'd, from Nafi, from Ibn Umar, to the same effect. And Ubaydullah ibn Umar narrated from Nafi that Ibn Umar would occasionally add "Hasten to the best of deeds" in his call to prayer.

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Reference: Nasb Al Rayate fi takhreej ahaadis al hidayate Book 1

Hadith No: 9
Al-Mutqii al-Hindi - Kunz al-Umal fi Sunan al-Aqwal wa'l-Afal
Volume: (8) - Page Number: (342)
23174 - A from Bilal: Bilal used to call the adhan at dawn and say: "Come to the best of deeds."

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Reference: Kanz al-Ummaal fi Sunan al-Aqwaal wa al-Af'aal Book 8