Leviticus 20:24-25

24 'Hence I have said to you, "1You are to possess their land, and I Myself will give it to you to possess it, a land flowing with milk and honey." I am the LORD your God, who has 2separated you from the peoples.
25 '3You are therefore to make a distinction between the clean animal and the unclean, and between the unclean bird and the clean; and you shall not make yourselves detestable by animal or by bird or by anything that creeps on the ground, which I have separated for you as unclean.