Deuteronomy 13:14

inquire carefully and diligently, seeking the truth of the matter. And if you find that what was said is certain, and that this abomination is a work which has been perpetrated

Other versions

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;

English Standard Version

then you shall inquire and make search and ask diligently. And behold, if it be true and certain that such an abomination has been done among you,

New International Version

then you must inquire, probe and investigate it thoroughly. And if it is true and it has been proved that this detestable thing has been done among you,