Sahih al-Bukhari 1860
صحيح البخاري#1860Sahihوَقَالَ لِي أَحْمَدُ بْنُ مُحَمَّدٍ حَدَّثَنَا إِبْرَاهِيمُ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَذِنَ عُمَرُ ـ رضى الله عنه ـ لأَزْوَاجِ النَّبِيِّ صلى الله عليه وسلم فِي آخِرِ حَجَّةٍ حَجَّهَا، فَبَعَثَ مَعَهُنَّ عُثْمَانَ بْنَ عَفَّانَ وَعَبْدَ الرَّحْمَنِ بْنَ عَوْفٍ.
Narrated Ibrahim's grand-father that 'Umar(ra) in his last Hajj allowed the wives of the Prophet(ﷺ)to perform Hajj and he sent with them 'Uthman bin 'Affan(ra) and 'Abdur-Rahman bin 'Auf(ra) as escorts
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: 28:40