Leviticus 20:3, 6

I will also set My face against that man [opposing him, withdrawing My protection from him] and will cut him off from his people [excluding him from the atonement made for them], because he has given some of his children to Molech, so as to defile My sanctuary and profane My holy name.

‘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]. [Is 54:5]