Deuteronomy 13:14 in the King James Version
Then shalt thou enquire, and make search, and ask diligently; and, behold, if it be truth, and the thing certain, that such abomination is wrought among you;
Context
13 certain wicked fellows have gone out from among you and have drawn away the inhabitants of their city, saying, “Let’s go and serve other gods,” which you have not known,
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.