Hadith 8:196
Narrated Ibn 'Abbas (RA):
The Prophet (ﷺ) was offered to marry the daughter of Hamzah. He said, "She is unlawful to me for she is the daughter of my brother in suckling; and what is unlawful by reason of blood relationship is unlawful by reason of suckling relationship." [Agreed upon].
وَعَنِ اِبْنِ عَبَّاسٍ رَضِيَ اَللَّهُ عَنْهُمَا { أَنَّ اَلنَّبِيَّ - صلى الله عليه وسلم -أُرِيدُ عَلَى اِبْنَةِ حَمْزَةَ. فَقَالَ: "إِنَّهَا لَا تَحِلُّ لِي; إِنَّهَا اِبْنَةُ أَخِي مِنْ اَلرَّضَاعَةِ } وَيَحْرُمُ مِنْ اَلرَّضَاعَةِ مَا يَحْرُمُ مِنْ اَلنَّسَبِ. مُتَّفَقٌ عَلَيْهِ