"The Messenger of Allah said: 'Any skin that is tanned has been purified."'
Sunan an-Nasa'i Book 41, Hadith 20
← Previous Hadith "A sheep of ours died, and we tanned its skin, and continued to make Nabidh in it until it wore out."

Sunan an-Nasa'i Book 41, Hadith 19 Next Hadith → "We are attacking the Maghrib, and they are people who worship idols, and they have waterskins in which they keep milk and water." Ibn 'Abbas said: "Tanning is purification." Ibn Wa'lah said: "Is this your own opinion, or something that you heard from the Messenger of Allah?" He said: "No, (I heard it) from the Messenger of Allah."

Sunan an-Nasa'i Book 41, Hadith 21