Deuteronomy 13:15
King James Version
“Thou shalt surely smite the inhabitants of that city with the edge of the sword, destroying it utterly, and all that therein, and the cattle thereof, with the edge of the sword.”
Context
12If thou shalt hear in one of thy cities, which the LORD thy God hath given thee to dwell there, saying,
13men, the children of Belial, are gone out from among you, and have withdrawn the inhabitants of their city, saying, Let us go and serve other gods, which ye have not known;
14Then shalt thou enquire, and make search, and ask diligently; and, behold, truth, the thing certain, such abomination is wrought among you;
15Thou shalt surely smite the inhabitants of that city with the edge of the sword, destroying it utterly, and all that therein, and the cattle thereof, with the edge of the sword.
16And thou shalt gather all the spoil of it into the midst of the street thereof, and shalt burn with fire the city, and all the spoil thereof every whit, for the LORD thy God: and it shall be an heap for ever; it shall not be built again.
17And there shall cleave nought of the cursed thing to thine hand: that the LORD may turn from the fierceness of his anger, and shew thee mercy, and have compassion upon thee, and multiply thee, as he hath sworn unto thy fathers;
18When thou shalt hearken to the voice of the LORD thy God, to keep all his commandments which I command thee this day, to do right in the eyes of the LORD thy God.