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 got all the prophets together, about four hundred men, and said to them, Am I to go to Ramoth-gilead to make war or not? And they said, Go up: for the Lord will give it into the hands of the king.
This is what the Lord of armies has said: Do not give ear to the words which the prophets say to you: they give you teaching of no value: it is from themselves that their vision comes, and not out of the mouth of the Lord.
And it came about in that year, when Zedekiah first became king of Judah, in the fourth year, in the fifth month, that Hananiah, the son of Azzur the prophet, who came from Gibeon, said to Jeremiah in the house of the Lord, before the priests and all the people,
This is what the Lord of armies, the God of Israel, has said about Ahab, the son of Kolaiah, and about Zedekiah, the son of Maaseiah, who are saying to you what is false in my name: See, I will give them up into the hands of Nebuchadrezzar, king of Babylon, and he will put them to death before your eyes.
Be on the watch for false prophets, who come to you in sheep's clothing, but inside they are cruel wolves.
My loved ones, do not put your faith in every spirit, but put them to the test, to see if they are from God: because a great number of false prophets have gone out into the world.