‘Ali ؓ said: I said: O Messenger of Allah ﷺ, shall I not tell you about the most beautiful girl of Quraish? He said: “who is she?ʿ I said: The daughter of Hamzah. He said: ʿDonʿt you know that she is the daughter of my brother through breastfeeding? Allah has forbidden (for marriage) through breastfeeding that which He has forbidden through blood ties.”
عَلِيٌّ قُلْتُ لِرَسُولِ اللهِ ﷺ أَلَا أَدُلُّكَ عَلَى أَجْمَلِ فَتَاةٍ فِي قُرَيْشٍ؟ قَالَ وَمَنْ هِيَ؟ قُلْتُ ابْنَةُ حَمْزَةَ قَالَ أَمَا عَلِمْتَ أَنَّهَا ابْنَةُأَخِي مِنَ الرَّضَاعَةِ إِنَّ اللهَ حَرَّمَ مِنَ الرَّضَاعِ مَا حَرَّمَ مِنَ النَّسَبِ