Sahih al-Bukhari 149
صحيح البخاري#149SahihNarrated `Abdullah bin `Umar:Once I went up the roof of our house and saw Allah's Messenger (ﷺ) answering the call of nature while sitting over two bricks facing Baitul-Maqdis (Jerusalem). (See Hadith No)
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: 4:15