بُلُوغُ الْمَرَامِ
Bulugh al-Maram 1132
Marriage
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 } [1] وَيَحْرُمُ مِنْ اَلرَّضَاعَةِ [2] مَا يَحْرُمُ مِنْ اَلنَّسَبِ. مُتَّفَقٌ عَلَيْهِ [3]
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].
Sunnah.com reference: Book 8, Hadith 196