Deuteronomy 13:9-11

9but thou shalt in any case kill him: thy hand shall be the first against him to put him to death, and afterwards the hands of all the people;

10and thou shalt stone him with stones, that he die; for he hath sought to draw thee away from Jehovah thy 1God who brought thee out of the land of Egypt, out of the house of bondage;

11and all Israel shall hear, and fear, and shall do no more any such wicked thing as this in thy midst.