Leviticus 20:5-8

⁵then I myself will set my face against that man and his clan, and I will cut him off and everyone else who prostitutes himself in order to play the harlot with Molech.

⁶The person who turns to those who talk with the dead, or to those who talk with spirits so as to prostitute themselves with them, I will set my face against that person; I will cut him off from among his people.

⁷Therefore consecrate yourselves and be holy, because I am Yahweh your God.

⁸You must keep my commands and carry them out. I am Yahweh who sets you apart as holy.