Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
muslim:366d – Isḥāq b. Manṣūr And ʾAbū Bakr b. Isḥāq > ʿAmr b. al-Rabīʿ > Yaḥyá b. Ayyūb > Jaʿfar b. Rabīʿah > Abū al-Khayr > Ibn Waʿlah al-Sabaʾī > Saʾalt ʿAbdullāh b. ʿAbbās > Innā Nakūn Bi-al-Maghrib Fayaʾtīnā al-Majūs Bi-al-Asqiyah Fīhā al-Māʾ Wa-al-Wadak > Āshrab > Araʾ Tarāh > Ibn ʿAbbās

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).  

مسلم:٣٦٦d – 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 ﷺ يَقُولُ دِبَاغُهُ طَهُورُهُ  

See similar narrations below:

Collected by Aḥmad, Dārimī
ahmad:2538 – Bahz > Ḥammād b. Salamah > Zayd b. Aslam > ʿAbd al-Raḥman b. And ʿLah > Saʾalt Ibn ʿAbbās > Innā Naghzū Hadhā al-Maghrib Waʾakthar Asqiyatihim Julūd al-Maytah

[Machine] I heard the Messenger of Allah ﷺ saying, "Its tanner is its purifier."  

أحمد:٢٥٣٨ – حَدَّثَنَا بَهْزٌ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ حَدَّثَنَا زَيْدُ بْنُ أَسْلَمَ عَنْ عَبْدِ الرَّحْمَنِ بْنِ وَعْلَةَ قَالَ سَأَلْتُ ابْنَ عَبَّاسٍ قُلْتُ إِنَّا نَغْزُو هَذَا الْمَغْرِبَ وَأَكْثَرُ أَسْقِيَتِهِمْ جُلُودُ الْمَيْتَةِ؟ قَالَ فَقَالَ

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ دِبَاغُهَا طُهُورُهَا  

darimi:2613 – Aḥmad b. Khālid > Muḥammad > Ibn Isḥāq > ʿAbd al-Raḥman b. Abū Yazīd > al-Qaʿqāʿ b. Ḥakīm > ʿAbd al-Raḥman b. And ʿLah > Saʾalt Ibn ʿAbbās > Julūd al-Maytah

[Machine] The Messenger of Allah ﷺ said, "Its tanning makes it pure."  

الدارمي:٢٦١٣ – أَخْبَرَنَا أَحْمَدُ بْنُ خَالِدٍ حَدَّثَنَا مُحَمَّدٌ هُوَ ابْنُ إِسْحَاقَ عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي يَزِيدَ عَنْ الْقَعْقَاعِ بْنِ حَكِيمٍ عَنْ عَبْدِ الرَّحْمَنِ بْنِ وَعْلَةَ قَالَ سَأَلْتُ ابْنَ عَبَّاسٍ عَنْ جُلُودِ الْمَيْتَةِ؟ فَقَالَ

قَالَ رَسُولُ اللَّهِ ﷺ «دِبَاغُهَا طَهُورُهَا»