Leviticus 20:1

Again, thou shalt say to the children of Israel, Whosoever [he be] of the children of Israel, or of the strangers that sojourn in Israel, that giveth [any] of his seed unto Molech; he shall surely be put to death: the people of the land shall stone him with stones.

And I will set my face against that man, and will cut him off from among his people; because he hath given of his seed unto Molech, to defile my sanctuary, and to profane my holy name.