Sahih al-Bukhari 211
صحيح البخاري#211SahihNarrated Ibn `Abbas:Allah's Messenger (ﷺ) drank milk, rinsed his mouth and said, "It has fat
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: 4:77