Leviticus 11:25-28

25and 1whoever picks up any of their carcasses shall wash his clothes and be unclean until evening. 26As for all the animals which have a divided hoof but do not show a split hoof, or do not chew the 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.