Leviticus 20:2-3

“You must also tell the people of Israel these things: ‘If a person in your country gives one of his children to Molech, that person must be killed. It doesn’t matter if he is a citizen or a foreigner living in Israel; you must throw stones at him and kill him. I will be against him and cut him off from his people, because he gave his children to Molech. He showed that he did not respect my holy name, and he made my Holy Place unclean.