'Chew the Cud' in the Bible

Only, you shall not eat these of them that chew the cud, or of them that divide the hoof: the camel, for he chews the cud but does not divide the hoof; he is unclean to you.

And the swine, though he divides the hoof and is cloven-footed, yet he does not chew the cud; he is unclean to you.