مسند أحمد

It was narrated from ‘Ali (رضي الله عنه) that the daughter of Hamzah followed them, crying: O uncle, O uncle. ‘Ali took her by the hand and said to Fatimah (رضي الله عنها), Here is your cousin, look after her. ‘Ali, Zaid and Ja`far disputed concerning her. Ali said: I took her and she is the daughter of my paternal uncle. Ja`far said: She is the daughter of my paternal uncle and her maternal aunt is married to me, Zaid said:She is the daughter of my brother. The Messenger of Allah (ﷺ) ruled that she be given to her maternal aunt and said: `The maternal aunt is like the mother.` Then he said to ‘Ali: `You are of me and I am of you.” And he said to Ja’far: `You resemble me in appearance and attitude.” And he said to Zaid: `You are our brother and our freed slave.` ‘Ali (رضي الله عنه) said to him. O Messenger of Allah (ﷺ), why don`t you marry the daughter of Hamzah? He said: `She is the daughter of my brother through breastfeeding.`