Sahih al-Bukhari 926
صحيح البخاري#926Sahihحَدَّثَنَا أَبُو الْيَمَانِ، قَالَ أَخْبَرَنَا شُعَيْبٌ، عَنِ الزُّهْرِيِّ، قَالَ حَدَّثَنِي عَلِيُّ بْنُ حُسَيْنٍ، عَنِ الْمِسْوَرِ بْنِ مَخْرَمَةَ، قَالَ قَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَسَمِعْتُهُ حِينَ تَشَهَّدَ يَقُولُ " أَمَّا بَعْدُ ". تَابَعَهُ الزُّبَيْدِيُّ عَنِ الزُّهْرِيِّ.
Narrated Al-Miswar bin Makhrama:Once Allah's Messenger (ﷺ) got up for delivering the Khutba and I heard him after "Tashah-hud" saying "Amma ba'du
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: 11:50