Musannaf Ibn Abi Shaybah 13747 — A person in ihram killing mosquitoes

Ubaydullah bin Abi Ziyad said: I saw Salim kill a mosquito in Makkah, and I asked him about it. He said: "We have been commanded to kill snakes and scorpions." I said: "They are our enemies." He said: "This too is an enemy."