Leviticus 20:22-27

22"You shall therefore keep all my statutes and all my rules and do them, that the land where I am bringing you to live may not vomit you out.

23And you shall not walk in the customs of the nation that I am driving out before you, for they did all these things, and therefore I detested 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, who has separated you from the peoples.

25You shall therefore separate the clean beast from the unclean, and the unclean bird from the clean. You shall not make yourselves detestable by beast or by bird or by anything with which the ground crawls, which I have set apart for you to hold unclean.

26You shall be holy to me, for I the Lord am holy and have separated you from the peoples, that you should be mine.

27"A man or a woman who is a medium or a necromancer shall surely be put to death. They shall be stoned with stones; their blood shall be upon them."