"I said: 'O Messenger of Allah, why do you choose wives from among Quraish and not from among us?' He said: 'Do you have anyone in mind?' I said: 'Yes, the daughter of Hamzah.' The Messenger of Allah said: 'She is not permissible for me (to marry); she is the daughter of my brother through breast-feeding.'" (Using translation from Nasāʾī 3304)
قُلْتُ يَا رَسُولَ اللهِ مَا لَكَ تُنَوِّقُ فِي قُرَيْشٍ وَتَدَعُنَا؟ قَالَ «وَعِنْدَكَ أَحَدٌ؟» قُلْتُ نَعَمْ بِنْتُ حَمْزَةَ قَالَ رَسُولُ اللهِ ﷺ «إِنَّهَا لَا تَحِلُّ لِي إِنَّهَا ابْنَةُ أَخِي مِنَ الرَّضَاعَةِ»