Leviticus 20:24-26

24And I promised you: You will inherit their land, since I will give it to you to possess, a land flowing with milk and honey. I am the Lord your God who set you apart from the peoples.

25Therefore you are to distinguish the clean animal from the unclean one, and the unclean bird from the clean one. Do not become contaminated by any land animal, bird, or whatever crawls on the ground; I have set these apart as unclean for you.

26You are to be holy to me because I, the Lord, am holy, and I have set you apart from the nations to be mine.