Maimuna said that some people passed the Prophet dragging a sheep of theirs as big as an ass. God’s messenger asked them why they did not make use of its skin, and when they told him that it had died a natural death he said, “Water and leaves of the mimosa flava* purify it." *The Arabic word is qaraz. meaning the leaves of the mimosa flave (salam) These were used for tanning. Ahmad and Abu Dawud transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب الطهارة / 510
Hadith Gradingالألبانی:حسن | زبیر علی زئی:إسناده حسن
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «إسناده حسن، رواه أحمد (6/ 334 ح 27370) و أبو داود (4126) [والنسائي (174/7، 175ح 4253) و حسنه ابن الملقن في تحفة المحتاج (131) ]»