Leviticus 11:26-27

26 “‘Every animal that has a split hoof not completely divided or that does not chew the cud is unclean for you; whoever touches the carcass of any of them will be unclean.

27 Of all the animals that walk on all fours, those that walk on their paws are unclean for you; whoever touches their carcasses will be unclean till evening.