Lev 20:22-26

22You shall keep all my statutes and all my ordinances, and observe them, so that the land to which I bring you to settle in may not vomit you out.23You shall not follow the practices of the nation that I am driving out before you. Because they did all these things, I abhorred them.24But I have said to you: You shall inherit their land, and I will give it to you to possess, a land flowing with milk and honey. I am the Lord your God; I have separated you from the peoples.25You shall therefore make a distinction between the clean animal and the unclean, and between the unclean bird and the clean; you shall not bring abomination on yourselves by animal or by bird or by anything with which the ground teems, which I have set apart for you to hold unclean.26You shall be holy to me; for I the Lord am holy, and I have separated you from the other peoples to be mine.