Deuteronomy 13:12-15

12If in one of thy cities, which Jehovah thy 1God hath given thee to dwell there, thou hearest, saying,

13There are men, children of Belial, gone out from among you, and they have drawn away the inhabitants of their city, saying, Let us go and serve other 2gods, whom ye have not known;

14then shalt thou inquire, and make search, and ask diligently; and if it be truth, [and] the thing be certain, that this abomination hath happened in the midst of thee,

15thou shalt surely smite the inhabitants of that city with the edge of the sword, devoting it to destruction, and all that is therein, and the cattle thereof, with the edge of the sword.