Sahih al-Bukhari 5626
صحيح البخاري#5626SahihNarrated Abu Sa`id Al-Khudri:I heard Allah's Messenger (ﷺ) forbidding the drinking of water by bending the mouths of water skins, i.e., drinking from the mouths directly
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: 74:52