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.
ahmad:2522ʿAffān > Ḥammād b. Salamah > Zayd b. Aslam > ʿAbd al-Raḥman b. And ʿLah

[Machine] I said to Ibn Abbas, "Indeed, we conquer the people of the Maghreb and their majority are non-Muslims. Perhaps Hammad said, and most of their water is impure." He said: "I heard the Prophet ﷺ saying: "Its tanning purifies it."  

أحمد:٢٥٢٢حَدَّثَنَا عَفَّانُ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ أَخْبَرَنَا زَيْدُ بْنُ أَسْلَمَ عَنْ عَبْدِ الرَّحْمَنِ بْنِ وَعْلَةَ قَالَ

قُلْتُ لِابْنِ عَبَّاسٍ إِنَّا نَغْزُو أَهْلَ الْمَغْرِبِ وَأَكْثَرُ أَسْقِيَتِهِمْ وَرُبَّمَا قَالَ حَمَّادٌ وَعَامَّةُ أَسْقِيَتِهِمْ الْمَيْتَةُ فَقَالَ سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ دِبَاغُهَا طُهُورُهَا