Sahih Muslim 5280
صحيح مسلم#5280SahihIbn Abbas reported:I served. (water of) Zamzam to Allah's Messenger (ﷺ), and he drank it while standing
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 36:154