Sahih al-Bukhari 5468
صحيح البخاري#5468SahihNarrated `Aisha:A boy was brought to the Prophet (ﷺ) to do Tahnik for him, but the boy urinated on him, whereupon the Prophet had water poured on the place of 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: 71:2