Jeremiah 28:15-17 - Joseph Benson’s Commentary on the Old and New Testaments

Then said Jeremiah, Hear now, Hananiah Jeremiah, being a second time confirmed in the truth of what he had foretold, and having likewise a special revelation relating to this false prophet, comes and calls him by his name, and tells him his doom, that he should die within a year, because he had taught rebellion against the Lord Had taught people to believe and trust to what was false, contradicting God's will revealed by Jeremiah, and encouraging and exciting the people to hold out against Nebuchadnezzar, and not quietly to yield to this dispensation of God. “Thus, as Hananiah had limited the accomplishment of his prophecy to the space of two years, to gain credit with the people by such a punctual prediction, so Jeremiah confines the trial of his veracity to a much shorter time, and the event, exactly answering to the prediction, evidently showed the falsehood of Hananiah's pretences.” Lowth. So Hananiah died the same year in the seventh month Two months after he had uttered this false prophecy, as appeareth from Jeremiah 28:1. So dangerous a thing it is for those who speak in the name of God to teach people contrary to his revealed will!