Muhammad ibn Ahmad ibn Yahya narrated from Al-Sindi ibn Muhammad, from Yunus ibn Ya'qub, from Abd Al-A'la ibn A'yan. He said: I asked Abu Abdullah عليه السلام about the urine of donkeys and mules. Imam عليه السلام said: "Wash your garment." I said: "What about their dung?" Imam عليه السلام said: "It is more common than that (and does not require washing)."