What the Bible says about False Prophecy
(From Forerunner Commentary)
With a note of sarcasm, Jeremiah replies that he would be thrilled if Hananiah's vision were correct—it would be a remarkable turn of events. Then he points out that the prophets before them had all prophesied calamity rather than prosperity. Hananiah's words were completely out of sync with God's pattern of warning His people through the prophets.
Prior to Jeremiah, God had sent Amos, Hosea, Isaiah, Micah, and Nahum to the kingdoms of Israel and Judah. He had also sent Jonah to the empire of Assyria. All of them warned of tragedy and disaster if the people did not turn to God. Such warnings reach all the way back to Moses, who recorded the "Blessings and Curses" of Leviticus 26 and Deuteronomy 28, detailing what God will do to a people who reject Him. Further, God also warns His people to be skeptical of those proclaiming a message of peace that lacks repentance (Jeremiah 4:10; 6:14; 8:11; 14:13; Ezekiel 13:10, 16). But, as God instructs in Deuteronomy 18:21-22, if what Hananiah said did not come to pass, it would be evidence that God had not sent him.
David C. Grabbe
Hananiah's Error