Sunan Abi Dawud 4125
Narrated Salamah ibn al-Muhabbaq:
On the expedition of Tabuk the Messenger of Allah (ﷺ) came to a household and, seeing a bucket  hanging, asked for water. They said: Messenger of Allah, the animal died a natural death. He replied; Its tanning is its purification.
حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، وَمُوسَى بْنُ إِسْمَاعِيلَ، قَالاَ حَدَّثَنَا هَمَّامٌ، عَنْ قَتَادَةَ، عَنِ الْحَسَنِ، عَنْ جَوْنِ بْنِ قَتَادَةَ، عَنْ سَلَمَةَ بْنِ الْمُحَبَّقِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم فِي غَزْوَةِ تَبُوكَ أَتَى عَلَى بَيْتٍ فَإِذَا قِرْبَةٌ مُعَلَّقَةٌ فَسَأَلَ الْمَاءَ فَقَالُوا يَا رَسُولَ اللَّهِ إِنَّهَا مَيْتَةٌ ‏.‏ فَقَالَ ‏
"‏ دِبَاغُهَا طُهُورُهَا ‏"‏ ‏.‏