Sahih al-Bukhari 219
صحيح البخاري#219SahihNarrated Anas bin Malik:The Prophet (ﷺ) saw a Bedouin making water in the mosque and told the people not to disturb him. When he finished, the Prophet (ﷺ) asked for some water and poured it over (the urine)
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: 4:85