Deuteronomy 13:15 in the King James Version
Thou shalt surely smite the inhabitants of that city with the edge of the sword, destroying it utterly, and all that is therein, and the cattle thereof, with the edge of the sword.
Context
14 then you shall inquire, investigate, and ask diligently. Behold, if it is true, and the thing certain, that such abomination was done among you,
15 you shall surely strike the inhabitants of that city with the edge of the sword, destroying it utterly, with all that is therein and its livestock, with the edge of the sword.
16 You shall gather all its plunder into the middle of its street, and shall burn with fire the city, with all of its plunder, to the LORD your God. It shall be a heap forever. It shall not be built again.