Leviticus 20:6-8

Amplified Bible

⁶ ‘As for the person who turns to mediums [who consult the dead] or to spiritists, to play the prostitute after them, I shall set My face against that person and will cut him off from his people [excluding him from the atonement made for them].^{(A) 7} You shall consecrate yourselves therefore, and be holy; for I am the Lord your God. ⁸ You shall keep My statutes and do them. I am the Lord who sanctifies you.