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
See Verses Found in Dictionary
Then the king of Israel assembled the prophets, about four hundred men, and he said to them, "Shall I go against Ramoth-Gilead for the battle, or should I refrain?" Then they said, "Go up, for the Lord will give it into the hand of the king."
Thus says Yahweh of hosts, "You must not listen to the words of the prophets who prophesy to you. They [are] deluding you [with] visions of their {mind}, They do not speak from the mouth of Yahweh.
And it was in that [same] year, at the beginning of the reign of Zedekiah, the king of Judah, in the fourth year, in the fifth month, that Hananiah, the son of Azzur, the prophet who [was] from Gibeon, said to me in the house of Yahweh before the eyes of the priests and all the people, {saying},
Thus says Yahweh of hosts, the God of Israel, concerning Ahab, the son of Kolaiah, and concerning Zedekiah, the son of Maaseiah, who are prophesying to you in my name a lie, 'Look, I [am] going to give them into the hand of Nebuchadnezzar the king of Babylon, and he will strike them before your eyes.
"Beware of false prophets who come to you in sheep's clothing, but inside are ravenous 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.