Sahih al-Bukhari 196
صحيح البخاري#196SahihNarrated Abu Musa:Once the Prophet (ﷺ) asked for a tumbler containing water. He washed his hands and face in it and also threw a mouthful of water in it
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: 4:62