From Sahih Muslim (Hadith 2868):
Salim reported on the authority of his father (Allah be pleased with them) that the Messenger of Allah (ﷺ) said:Five are the (beasts) which if one kills them in the precincts of the Ka'ba or in the state of lhram entail no sin: rat, scorpion, crow, kite and voracious dog. In another version the words are:" as a Muhrim and in the state of lhram
Reference: Muslim 2868