Sahih al-Bukhari 5100
صحيح البخاري#5100Sahihحَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ شُعْبَةَ، عَنْ قَتَادَةَ، عَنْ جَابِرِ بْنِ زَيْدٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قِيلَ لِلنَّبِيِّ صلى الله عليه وسلم أَلاَ تَزَوَّجُ ابْنَةَ حَمْزَةَ قَالَ " إِنَّهَا ابْنَةُ أَخِي مِنَ الرَّضَاعَةِ ". وَقَالَ بِشْرُ بْنُ عُمَرَ حَدَّثَنَا شُعْبَةُ سَمِعْتُ قَتَادَةَ سَمِعْتُ جَابِرَ بْنَ زَيْدٍ مِثْلَهُ.
Narrated Ibn `Abbas:It was said to the Prophet, "Won't you marry the daughter of Hamza?" He said, "She is my foster niece (brother's daughter)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 67:38