O Messenger of Allah ﷺ, why do you choose to get married from among Quraysh and you ignore us? He said: ʿHave you anybody to suggest?ʿ I said: Yes, the daughter of Hamzah. The Messenger of Allah ﷺ said: ʿShe is not permissible for me (to marry), for she is the daughter of my brother through breastfeeding.ʿ (Using translation from Aḥmad 620)
قُلْتُ يَا رَسُولَ اللهِ مَا لَكَ تَتُوقُ فِي قُرَيْشٍ وَتَدَعُنَا قَالَ وَعِنْدَكُمْ شَيْءٌ؟ قَالَ قُلْنَا نَعَمِ ابْنَةُ حَمْزَةَ قَالَ فَقَالَ فَإِنَّهَا لَا تَحِلُّ لِي هِيَ ابْنَةُ أَخِي مِنَ الرَّضَاعَةِ