Hadith 510
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.
وَعَن مَيْمُونَة مر على النَّبِي الله صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ رِجَالٌ مِنْ قُرَيْشٍ يَجُرُّونَ شَاةً لَهُمْ مِثْلَ الْحِمَارِ فَقَالَ لَهُمْ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَوْ أَخَذْتُمْ إِهَابَهَا» قَالُوا إِنَّهَا مَيْتَةٌ فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «يُطَهِّرُهَا الْمَاءُ والقرظ» . رَوَاهُ أَحْمد وَأَبُو دَاوُد