Deuteronomy 13:9-11

But you shall kill him. Your hand shall be first against him to put him to death, and afterward the hand of all the people. You shall stone him to death with stones, because he sought to draw you away from the LORD your God, who brought you out of the land of Egypt, out of the house of slavery. And all Israel shall hear and fear and never again do any such wickedness as this among you.