Sahih al-Bukhari 5538
صحيح البخاري#5538SahihNarrated Maimuna:A mouse fell into the butter-fat and died. The Prophet (ﷺ) was asked about that. He said, "Throw away the mouse and the butter-fat that surrounded it, and eat the rest of the butter-fat (As-Samn)
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: 72:63