Sahih Muslim 363
Sahih Muslim · Book 3: The Book of Menstruation · Hides of dead animals are purified by tanning
Ibn Abbas reported:
وَحَدَّثَنَا ابْنُ أَبِي عُمَرَ ، وَعَبْدُ اللَّهِ بْنُ مُحَمَّدٍ الزُّهْرِيُّ ، - وَاللَّفْظُ لاِبْنِ أَبِي عُمَرَ - قَالاَ حَدَّثَنَا سُفْيَانُ ، عَنْ عَمْرٍو ، عَنْ عَطَاءٍ ، عَنِ ابْنِ عَبَّاسٍ ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم مَرَّ بِشَاةٍ مَطْرُوحَةٍ أُعْطِيَتْهَا مَوْلاَةٌ لِمَيْمُونَةَ مِنَ الصَّدَقَةِ فَقَالَ النَّبِيُّ صلى الله عليه وسلم " أَلاَّ أَخَذُوا إِهَابَهَا فَدَبَغُوهُ فَانْتَفَعُوا بِهِ " .
The Messenger of Allah (ﷺ) happened to pass by a goat thrown (away) which had been in fact given to the freed slave-girl of Maimuna as charity. Upon this the Messenger of Allah (way peace he upon him) said: Why did they not get its skin? They had better tan it and make use of it.