The Book of Pilgrimage (Kitab Al-Hajj)
Muslim :: Book 7 : Hadith 2729
Ibn Juraij reported: I said to Nafi: What is that which you heard Ibn, Umar declaring permissible for a Mubrim to kill some of the beasts? Nafi, said to me that 'Abdullah had reported: I heard Allah's Messenger (may peace be upon him) as saying: Five are the beasts in killing which or their being killed, there is no sin: crow, kite, scorpion, rat and voracious dog.