Leviticus 11:24-28

24‘By these, moreover, you will be made unclean: whoever touches their carcasses becomes unclean until evening, 25and 1whoever picks up any of their carcasses shall wash his clothes and be unclean until evening. 26Concerning all the animals which divide the hoof but do not make a split hoof, or which do not chew cud, they are unclean to you: whoever touches them becomes unclean. 27Also whatever walks on its paws, among all the creatures that walk on all fours, are unclean to you; whoever touches their carcasses becomes unclean until evening, 28and the one who picks up their carcasses shall wash his clothes and be unclean until evening; they are unclean to you.