Sahih al-Bukhari 234
صحيح البخاري#234Sahihحَدَّثَنَا آدَمُ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنَا أَبُو التَّيَّاحِ، يَزِيدُ بْنُ حُمَيْدٍ عَنْ أَنَسٍ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم يُصَلِّي قَبْلَ أَنْ يُبْنَى الْمَسْجِدُ فِي مَرَابِضِ الْغَنَمِ.
Narrated Anas:Prior to the construction of the mosque, the Prophet (ﷺ) offered the prayers at sheep-folds
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: 4:100