Sahih al-Bukhari 5984
صحيح البخاري#5984Sahihحَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، حَدَّثَنَا اللَّيْثُ، عَنْ عُقَيْلٍ، عَنِ ابْنِ شِهَابٍ، أَنَّ مُحَمَّدَ بْنَ جُبَيْرِ بْنِ مُطْعِمٍ، قَالَ إِنَّ جُبَيْرَ بْنَ مُطْعِمٍ أَخْبَرَهُ أَنَّهُ، سَمِعَ النَّبِيَّ صلى الله عليه وسلم يَقُولُ " لاَ يَدْخُلُ الْجَنَّةَ قَاطِعٌ ".
Narrated Jubair bin Mut`im:That he heard the Prophet (ﷺ) saying, "The person who severs the bond of kinship will not enter Paradise
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: 78:15