Sahih al-Bukhari 5615
صحيح البخاري#5615SahihNarrated An-Nazzal:Ali came to the gate of the courtyard (of the Mosque) and drank (water) while he was standing and said, "Some people dislike to drink while standing, but I saw the Prophet (ﷺ) doing (drinking water) as you have seen me doing now
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: 74:41