Deuteronomy 13:8 in the King James Version
Thou shalt not consent unto him, nor hearken unto him; neither shall thine eye pity him, neither shalt thou spare, neither shalt thou conceal him:
Context
7 of the gods of the peoples who are around you, near to you, or far off from you, from the one end of the earth even to the other end of the earth—
8 you shall not consent to him nor listen to him; neither shall your eye pity him, neither shall you spare, neither shall you conceal him;
9 but you shall surely kill him. Your hand shall be first on him to put him to death, and afterwards the hands of all the people.