حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدٍ، حَدَّثَنَا الْأَعْمَشُ، عَنْ سَعْدِ بْنِ عُبَيْدَةَ، عَنْ أَبِي عَبْدِ الرَّحْمَنِ، عَنْ عَلِيٍّ
رَضِيَ اللَّهُ عَنْهُ قَالَ قُلْتُ: يَا رَسُولَ اللَّهِ مَا لَكَ تَنَوَّقُ فِي قُرَيْشٍ وَلَا تَزَوَّجُ إِلَيْنَا قَالَ وَعِنْدَكَ شَيْءٌ قَالَ قُلْتُ: نَعَمْ ابْنَةُ حَمْزَةَ قَالَ تِلْكَ ابْنَةُ أَخِي مِنْ الرَّضَاعَةِ
I said: O Messenger of Allah (sallallahu alayhi wa sallam), why do you marry from Quraish and you do not marry from among us? He said: ‘Do you have anyone’ I said: Yes, the daughter of Hamzah. He said: ‘She is the daughter of my brother through breastfeeding.’.
Musnad Ahmad 1286, Book 5, Musnad 'Ali Ibn Abi Talib, Hadith 758. 1 min read