Muwatta Malik, Book 25, Hadith 18 (USC-MSA)

Yahya related to me from Malik from Yazid ibn Abdullah ibn Qusayt from Muhammad ibn Abd ar-Rahman ibn Thawban from his mother that A'isha, the wife of the Prophet, may Allah bless him and grant him peace, said that the Messenger of Allah, may Allah bless him and grant him peace, ordered that the skins of carrion be used after they had been tanned.

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَزِيدَ بْنِ عَبْدِ اللَّهِ بْنِ قُسَيْطٍ، عَنْ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ ثَوْبَانَ، عَنْ أُمِّهِ، عَنْ عَائِشَةَ، زَوْجِ النَّبِيِّ صلى الله عليه وسلم أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَمَرَ أَنْ يُسْتَمْتَعَ بِجُلُودِ الْمَيْتَةِ إِذَا دُبِغَتْ ‏.‏

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also referenced under: Book 25, Hadith 1069 (In-Book)