Sahih Muslim 812
صحيح مسلم#812SahihAbdullah b. Abbas said:I heard the Messenger of Allah (ﷺ) say: When the skin is tanned it becomes purified
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: 3:133