Sahih al-Bukhari 254
صحيح البخاري#254SahihNarrated Jubair bin Mut`im:Allah's Messenger (ﷺ) said, "As for me, I pour water three times on my head." And he pointed with both his hands
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: 5:7