Deuteronomy 13:8-10

New Revised Standard Version, Anglicised Catholic Edition

⁸ you must not yield to or heed any such persons. Show them no pity or compassion and do not shield them. ⁹ But you shall surely kill them; your own hand shall be first against them to execute them, and afterwards the hand of all the people. ¹⁰ Stone 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.