Ibn Wa'la al-Saba'i reported: I asked 'Abdullah b. '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 said: I heard the Messenger of Allah (ﷺ) say: Tanning purifies it (the skin).

Ibn Wa'la al-Saba'i reported: I asked 'Abdullah b. '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 said: I heard the Messenger of Allah (ﷺ) say: Tanning purifies it (the skin).

وَحَدَّثَنِي إِسْحَاقُ بْنُ مَنْصُورٍ، وَأَبُو بَكْرِ بْنُ إِسْحَاقَ عَنْ عَمْرِو بْنِ الرَّبِيعِ، أَخْبَرَنَا يَحْيَى بْنُ أَيُّوبَ، عَنْ جَعْفَرِ بْنِ رَبِيعَةَ، عَنْ أَبِي الْخَيْرِ، حَدَّثَهُ قَالَ حَدَّثَنِي ابْنُ وَعْلَةَ السَّبَئِيُّ، قَالَ سَأَلْتُ عَبْدَ اللَّهِ بْنَ عَبَّاسٍ قُلْتُ إِنَّا نَكُونُ بِالْمَغْرِبِ فَيَأْتِينَا الْمَجُوسُ بِالأَسْقِيَةِ فِيهَا الْمَاءُ وَالْوَدَكُ فَقَالَ اشْرَبْ ‏.‏ فَقُلْتُ أَرَأْىٌ تَرَاهُ فَقَالَ ابْنُ عَبَّاسٍ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ ‏ "‏ دِبَاغُهُ طَهُورُهُ ‏"‏ ‏.‏