Musannaf Ibn Abi Shaybah 2041 — The blood of fleas and flies

Al-Harith bin Malik said: I was with al-Hasan at his house when a man came and asked: If a man spends the night in a garment and in the morning there is a great deal of flea blood on his clothes, should he wash it, or sprinkle water on it, or pray in it as it is? He said: He should neither sprinkle water on it nor wash it; rather he should pray in it as it is.