Musnad Ahmad 914
It was narrated that ‘Ali (رضي الله عنه) said:
I said: O Messenger of Allah (ﷺ), why do I see you choose a wife from among Quraish and you ignore us? He said: `Have you anyone to suggest?` I said: Yes, the daughter of Hamzah. The Messenger of Allah (ﷺ) said: “She is the daughter of my brother through breastfeeding.”
حَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا الْأَعْمَشُ، عَنْ سَعْدِ بْنِ عُبَيْدَةَ، عَنْ أَبِي عَبْدِ الرَّحْمَنِ، عَنْ عَلِيٍّ، رَضِيَ اللَّهُ عَنْهُ قَالَ قُلْتُ يَا رَسُولَ اللَّهِ مَا لِي أَرَاكَ تَنَوَّقُ فِي قُرَيْشٍ وَتَدَعُنَا قَالَ عِنْدَكَ شَيْءٌ قُلْتُ بِنْتُ حَمْزَةَ قَالَ هِيَ بِنْتُ أَخِي مِنْ الرَّضَاعَةِ‏.‏