'Abdullah bin Abbas (RA) said: I heard the Apostle of Allah (ﷺ) say: When the skin is tanned it becomes purified.

This hadith has been transmitted on the authority of Ibn 'Abbas by another chain of transmitters.

Ibn Wa'la al-Saba'i reported: I asked 'Abdullah bin 'Abbas saying: We are the inhabitants of the western regions. The Magians come to us with skins full of water and fat. He said: Drink. I said to him: Is it your own opinion? Ibn Abbas (RA) said: I heard the Messenger of Allah (ﷺ) say: Tanning purifies it (the skin).

Narrated to us by Suwayd ibn Sa‘id, narrated to us by Hafs ibn Maysarah, from Zayd ibn Aslam, from ‘Abd al-Rahman ibn Wa‘lah, a man from the people of Egypt, that he came to ‘Abd Allah ibn ‘Abbas. And narrated to us by Abu al-Tahir—and the wording is his—he informed us Ibn Wahb, he informed me Malik ibn Anas, and others, from Zayd ibn Aslam, from ‘Abd al-Rahman ibn Wa‘lah al-Saba’i from the people of Egypt, that he asked ‘Abd Allah ibn ‘Abbas about what is pressed from grapes? Ibn ‘Abbas said: "A man gifted the Messenger of Allah, peace and blessings be upon him, a container of wine. The Messenger of Allah, peace and blessings be upon him, said to him: Do you know that Allah has forbidden it? He said: No. Then he spoke privately to a man. The Messenger of Allah, peace and blessings be upon him, said to him: What did you say to him privately? He said: I ordered him to sell it. He said: Indeed, the One who forbade its drinking has forbidden its sale. He said: So he opened the waterskin until what was in it was gone."

'Abdul Rahman bin Wa'ala narrated this on the authority of 'Abdullah bin Abbas (RA) .