Leviticus 20:22-27 - You Shall Be Holy
22 "Be sure to keep all my statutes and observe all my ordinances, so that the land where I'm about to bring you to live won't vomit you out. 23 You are not to live by the customs of the nations, whom I've cast away right in front of you. Because they did all of these things, I detested them. 24 But I've promised you that you'll inherit the land that I'm about to give you as your permanent possession a land flowing with milk and honey. 25 "I am your God. I've separated you from the people. You are to differentiate between the clean animal and the unclean and between the unclean bird and the clean. You are not to make yourselves detestable on account of any animal, bird, or any creeping creature of the ground that I've separated for you as unclean. 26 "You are to be holy toward me, because I, the LORD, am holy. I've separated you from among the people to be mine.
27 "Moreover, a man or a woman who has a ritual spirit or a familiar spirit is certainly to die. They are to be stoned to death with boulders. They will continue to bear responsibility for their guilt."