Leviticus 11:47

To make a difference between the unclean and the clean ,.... Whether of beasts, fish, fowl, and flying creeping things:

and between the beast that may be eaten, and the beast that may not be eaten ; the former clause takes in all in general, this instances in a particular sort of creatures; and the first mentioned of which, that might be eaten, are, that part the hoof, are cloven footed, and chew the cud; and that might not, that chew the cud, but divide not the hoof, or divide the hoof, but chew not the cud; and now, by such like descriptions and distinctions of the creatures treated of, the Israelites would be able to make a difference between the one and the other, and know what was to be eaten, and what not.