Leviticus 20:2; Leviticus 20:27

2 "You shall also say to the sons of Israel: 'Any man from the sons of Israel or from the aliens sojourning in Israel who gives any of his offspring to Molech, shall surely be put to death; the people of the land shall stone him with stones.

27 'Now a man or a woman who is a medium or a spiritist shall surely be put to death. They shall be stoned with stones, their bloodguiltiness is upon them.' "