مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 484
Purification
Laws about different kinds of water - Section 2
وَعَن جَابر قَالَ: سُئِلَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَتَوَضَّأُ بِمَا أَفْضَلَتِ الْحُمُرُ؟ قَالَ: «نَعَمْ وَبِمَا أَفْضَلَتِ السِّبَاعُ كُلُّهَا» . رَوَاهُ فِي شَرْحِ السّنة
Jabir said that when God’s messenger was asked whether ablution might be performed with water which asses had left, he replied, “Yes, and with what all beasts of prey leave.” Baghawi transmitted it in Sharh as-sunna.
Mishkat al-Masabih, 484ضَعِيف (الألباني)