Leviticus 20:2-5

2“Moreover, you shall say to the children of Israel, ‘Any Israelite or any stranger residing in Israel who gives any of his children to Molech (the god of the Ammonites) [as a human sacrifice] shall most certainly be put to death; the people of the land shall stone him with stones.

3I 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.

4If the people of the land should ever tolerate that man when he gives any of his children [as a burnt offering] to Molech, and fail to put him to death [as My law requires],

5then I shall set My face against that man and against his [extended] family, and I will cut off from their people both him and all who follow him in playing the prostitute (commit apostasy) with Molech.