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 unto them, Shall I go against Ramothgilead to battle, or shall I forbear? And they said, Go up, for the Lord shall deliver it into the hand of the king.
Thus hath the LORD of the hosts said, Hearken not unto the words of the prophets that prophesy unto you: they make you vain: they speak a vision of their own heart, and not out of the mouth of the LORD.
And it came to pass the same year, in the beginning of the reign of Zedekiah king of Judah, in the fourth year, and in the fifth month, that Hananiah the son of Azur the prophet, which was of Gibeon, spoke unto me in the house of the LORD, in the presence of the priests and of all the people, saying,
Thus hath the LORD of the hosts the God of Israel said regarding Ahab the son of Kolaiah, and regarding Zedekiah the son of Maaseiah, who prophesy falsely unto you in my name; Behold, I deliver them into the hand of Nebuchadrezzar king of Babylon; and he shall slay them before your eyes;
Keep yourselves also from the false prophets, who come to you in sheep's clothing, but inwardly they are ravening wolves.
Beloved, do not believe every spirit, but try the spirits whether they are of God because many false prophets are gone out into the world.