حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ وَابْنُ بَكْرٍ قَالَا حَدَّثَنَا سَعِيدٌ عَنْ قَتَادَةَ عَنْ جَابِرِ بْنِ زَيْدٍ عَنِ ابْنِ عَبَّاسٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أُرِيدَ عَلَى ابْنَةِ حَمْزَةَ أَنْ يَتَزَوَّجَهَا فَقَالَ إِنَّهَا ابْنَةُ أَخِي مِنْ الرَّضَاعَةِ فَإِنَّهُ يَحْرُمُ مِنْ الرَّضَاعِ مَا يَحْرُمُ مِنْ النَّسَبِ
مسند امام احمد بن حنبل · Hadith 3144
It was narrated from Ibn 'Abbas (RA) that it was suggested to the Messenger of Allah (PBUH) that he should marry the daughter of Hamzah and he said: "She is the daughter of my brother through breastfeeding. What becomes mah ram (forbidden for marriage) through breastfeeding is that which becomes mahram through blood ties”.
Sanad
حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ وَابْنُ بَكْرٍ قَالَا حَدَّثَنَا سَعِيدٌ عَنْ قَتَادَةَ عَنْ جَابِرِ بْنِ زَيْدٍ عَنِ ابْنِ عَبَّاسٍ