Deuteronomy 13:7-9 English Standard Version (ESV)

7. some of the gods of the peoples who are around you, whether near you or far off from you, from the one end of the earth to the other,

8. you shall not yield to him or listen to him, nor shall your eye pity him, nor shall you spare him, nor shall you conceal him.

9. 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.

Deuteronomy 13