Sahih al-Bukhari 429
صحيح البخاري#429Sahihحَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي التَّيَّاحِ، عَنْ أَنَسٍ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم يُصَلِّي فِي مَرَابِضِ الْغَنَمِ، ثُمَّ سَمِعْتُهُ بَعْدُ يَقُولُ كَانَ يُصَلِّي فِي مَرَابِضِ الْغَنَمِ قَبْلَ أَنْ يُبْنَى الْمَسْجِدُ.
Narrated Abu Al-Taiyah [??]:Anas said, "The Prophet (ﷺ) prayed in the sheep fold." Later on I heard him saying, "He prayed in the sheep folds before the construction of the, mosque
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: 8:79