Deuteronomy 13:7-9

New Revised Standard Version Catholic Edition

⁷ any 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, 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.