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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Then the king of Israel gathered the prophets together, about four hundred men, and said to them, "Shall I go against Ramoth-gilead to battle or shall I refrain?" And they said, "Go up, for the Lord will give it into the hand of the king."
Thus says the LORD of hosts, "Do not listen to the words of the prophets who are prophesying to you They are leading you into futility; They speak a vision of their own imagination, Not from the mouth of the LORD.
Now in the same year, in the beginning of the reign of Zedekiah king of Judah, in the fourth year, in the fifth month, Hananiah the son of Azzur, the prophet, who was from Gibeon, spoke to me in the house of the LORD in the presence of the priests and all the people, saying,
"Thus says the LORD of hosts, the God of Israel, concerning Ahab the son of Kolaiah and concerning Zedekiah the son of Maaseiah, who are prophesying to you falsely in My name, 'Behold, I will deliver them into the hand of Nebuchadnezzar king of Babylon, and he will slay them before your eyes.
"Beware of the false prophets, who come to you in sheep's clothing, but inwardly are ravenous wolves.
Beloved, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world.