Reference: Prophets, False
Morish
These, at various periods in the history of Israel, appeared in large numbers: Ahab had 'about four hundred' of them. 1Ki 22:6. Such are described as speaking "a vision of their own heart, and not out of the mouth of the Lord." Jer 23:16. There were three that opposed Jeremiah to his face
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So the king of Israel assembled about four hundred prophets and asked them, "Should I attack Ramoth Gilead or not?" They said, "Attack! The sovereign one will hand it over to the king."
The Lord who rules over all says to the people of Jerusalem: "Do not listen to what those prophets are saying to you. They are filling you with false hopes. They are reporting visions of their own imaginations, not something the Lord has given them to say.
The following events occurred in that same year, early in the reign of King Zedekiah of Judah. To be more precise, it was the fifth month of the fourth year of his reign. The prophet Hananiah son of Azzur, who was from Gibeon, spoke to Jeremiah in the Lord's temple in the presence of the priests and all the people.
"The Lord God of Israel who rules over all also has something to say about Ahab son of Kolaiah and Zedekiah son of Maaseiah, who are prophesying lies to you and claiming my authority to do so. 'I will hand them over to King Nebuchadnezzar of Babylon and he will execute them before your very eyes.
"Watch out for false prophets, who come to you in sheep's clothing but inwardly are voracious wolves.
Dear friends, do not believe every spirit, but test the spirits to determine if they are from God, because many false prophets have gone out into the world.