(50) باب تَحْرِيمِ بِنْتِ الأَخِ مِنَ الرَّضَاعَةِ .
It was narrated that 'Ali, may Allah be pleased with him, said:
"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.'"
Reference: Sunan an-Nasa'i 3304
In-book reference: Book 26, Hadith 109
English translation: Vol. 4, Book 26, Hadith 3306