Hadith No: 1
Ibn Hajar al-Asqalani - Fath al-Bari Sharh Sahih al-Bukhari - Book of the Virtues of the Companions
Chapter on the Merits of Ali ibn Abi Talib, the Qurashi al-Hashimi, Father of Hasan (peace be upon him and them)
Volume: (7) - Page Number: (60)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And his statement: When it was revealed: {So say, "Come, let us call our sons and your sons…" (Surah Al-Imran 3:61)} he called Ali, Fatimah, Hasan, and Husayn, peace be upon them, and said: "O Allah, these are my family."

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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 Unemphatic Letter 'Ayn
Completion of the First Part of the Letter 'Ayn - 5704: Ali ibn Abi Talib al-Hashimi (r)
Volume: (4) - Page Number: (468)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And this verse was revealed: {So say, "Come, let us call our children and your children, our women and your women, ourselves and yourselves" (Al-Imran 3:61)} Then the Messenger of Allah (peace be upon him and his holy progeny) called Ali, Fatimah, Hasan, and Husayn (peace be upon them) and said, "O Allah, these are my family."

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