Sahih al-Bukhari 2471
صحيح البخاري#2471SahihNarrated Hudhaifa:I saw Allah's Messenger (ﷺ) coming (or the Prophet (ﷺ) came) to the dumps of some people and urinated there while standing
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: 46:32