Clarke's Bible Commentary - Deuteronomy 17:4 Verse 4. 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, &c. 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, ver. 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.
John Gill's Bible Commentary Ver. 4. And it be told thee, and thou hast heard of it, and inquired diligently , etc.] A report of this kind was not to be neglected; though it was not to be concluded upon as certain by hearsay, it was to be looked into, and the persons that brought it thoroughly examined; so the Targum of Jonathan, “and inquired the witnesses well,” what proof and evidence they could give of the fact, who the persons were, when and where, and in what manner the sin was committed: and, behold, [it be] true, [and] the thing certain ; upon examining the witnesses the case is plain and out of all question: that such abomination is wrought in Israel ; to do it in any country was abominable, but much more so in the land of Israel, among the professing people of God, who had the knowledge of the true God, and had had so many proofs of his deity, his power and providence, as well as received so many favours and blessings from him, and had such laws and statutes given them as no other people had.
Matthew Henry Commentary Verses 1-7 - No creature which had any blemish was to be offered in sacrifice to God. We are thus called to remember the perfect, pure, and spotles sacrifice of Christ, and reminded to serve God with the best of ou abilities, time, and possession, or our pretended obedience will be hateful to him. So great a punishment as death, so remarkable a deat as stoning, must be inflicted on the Jewish idolater. Let all who in our day set up idols in their hearts, remember how God punished thi crime in Israel.
Original Hebrew והגד 5046 לך ושׁמעת 8085 ודרשׁת 1875 היטב 3190 והנה 2009 אמת 571 נכון 3559 הדבר 1697 נעשׂתה 6213 התועבה 8441 הזאת 2063 בישׂראל׃ 3478