Jeremiah 28:3 - Ellicott's Commentary On The Whole Bible

Within two full years. — Literally, two years of days. Hananiah, not deterred by the previous warnings of Jeremiah, becomes bolder in the definiteness of his prediction. The conspiracy of Judah and the neighbouring states against Nebuchadnezzar was clearly ripening, and he looked on its success as certain. Prediction stood against prediction, and, as there were no signs or wonders wrought, men had to judge from what they knew of the lives of the men who uttered them which of them was most worthy of credit. The contest between the two prophets reminds us of Deuteronomy 18:20-22.