Deut 13:6-10

6If anyone secretly entices you—even if it is your brother, your father's son or your mother's son, or your own son or daughter, or the wife you embrace, or your most intimate friend—saying, “Let us go worship other gods,” whom neither you nor your ancestors have known,7any of the gods of the peoples that are around you, whether near you or far away from you, from one end of the earth to the other,8you must not yield to or heed any such persons. Show them no pity or compassion and do not shield them.9But you shall surely kill them; your own hand shall be first against them to execute them, and afterwards the hand of all the people.10Stone them to death for trying to turn you away from the Lord your God, who brought you out of the land of Egypt, out of the house of slavery.