Sahih al-Bukhari 1190
صحيح البخاري#1190SahihNarrated Abu Huraira:Allah's Messenger (ﷺ) said, "One prayer in my Mosque is better than one thousand prayers in any other mosque excepting Al-Masjid-Al-Haram
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 20:3