Sunan an-Nasa'i 4241
سنن النسائي#4241SahihIt was narrated that Ibn 'Abbas said:"The Messenger of Allah said: 'Any skin that is tanned has been purified
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 41:20