Leviticus 11:27

And every one among all the wild beasts that moves upon its fore feet, which goes on all four, is unclean to you; every one that touches their dead bodies shall be unclean till evening.

And whatsoever goeth upon his paws, among all manner of beasts that go on all four, those are unclean unto you: whoso toucheth their carcase shall be unclean until the even.

Whatever goes on its paws, among all animals that go on all fours, they are unclean to you. Whoever touches their carcass shall be unclean until the evening.