Leviticus 11:45-49

For I am the LORD that bringeth you up out of the land of Egypt, to be your God: ye shall therefore be holy, for I am holy.

This is the law of the beasts, and of the fowl, and of every living creature that moveth in the waters, and of every creature that creepeth upon the earth:

To make a difference between the unclean and the clean, and between the beast that may be eaten and the beast that may not be eaten.