Leviticus 20:5-8

⁵then I will set my face against that man, and against his family, and will cut him off, and all that go a whoring after him, to commit whoredom with Molech, from among their people.

⁶And the soul that turneth after such as have familiar spirits, and after wizards, to go a whoring after them, I will even set my face against that soul, and will cut him off from among his people.

⁷Sanctify yourselves therefore, and be ye holy: for I am the Lord your God.

⁸And ye shall keep my statutes, and do them: I am the Lord which sanctify you.