If it be told thee - In a private way by any confidential person. And thou hast heard of it; so that it appears to be notorious, very likely to be true, and publicly scandalous. And hast inquired diligently - sought to find out the truth of the report by the most careful examination of persons reporting, circumstances of the case, etc. And, behold, it be true - the report is not founded on vague rumor, hearsay, or malice. And the thing certain - substantiated by the fullest evidence. Then shalt thou bring forth that man, Deuteronomy 17:5. As the charge of idolatry was the most solemn and awful that could be brought against an Israelite, because it affected his life, therefore God required that the charge should be substantiated by the most unequivocal facts, and the most competent witnesses. Hence all the precautions mentioned in the fourth verse must be carefully used, in order to arrive at so affecting and so awful a truth.
Compare Deuteronomy 13:1 ff. Here special reference is made to the legal forms to be adopted, Deuteronomy 17:5-7. The sentence was to be carried into effect at “the gates” (compare Genesis 19:1 note) of the town in which the crime was committed; because, as “all the people” were to take a part, an open space would be requisite for the execution. Note the typical and prophetical aspect of the injunction; compare Acts 7:58; Hebrews 13:12.