Sahih al-Bukhari 3501
صحيح البخاري#3501Sahihحَدَّثَنَا أَبُو الْوَلِيدِ، حَدَّثَنَا عَاصِمُ بْنُ مُحَمَّدٍ، قَالَ سَمِعْتُ أَبِي، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لا يَزَالُ هَذَا الأَمْرُ فِي قُرَيْشٍ، مَا بَقِيَ مِنْهُمُ اثْنَانِ ".
Narrated Ibn `Umar:The Prophet (ﷺ) said, "Authority of ruling will remain with Quraish, even if only two of them remained
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: 61:11