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
And the king of Israel will gather together the prophets, about four hundred men, and he will say to them. Shall I go to Ramoth-Gilead to war, or shall I desist? and they will say, Go up; and Jehovah will give into the hand of the king.
Thus said Jehovah of armies, Ye shall not hear to the words of the prophets prophesying to you; they making you vain: they will speak the vision of their heart, not from the mouth of Jehovah.
And it will be in this year, in the beginning of the reign of Zedekiah king of Judah, in the fourth year, in the fifth month, Hananiah son of Azur the prophet which was from the hill, said to me in the house of Jehovah, before the eyes of the priests, and all the people, saying,
Thus said Jehovah of armies, God of Israel, to Ahab son of Kolaiah, and to Zedekiah son of Maaseiah, prophesying a lie to you in my name; Behold, I gave them into the hand of Nebuchadnezzar king of Babel, and he struck them before your eyes;
And hold from false prophets which come in to you in sheep's dresses, but within they are rapacious wolves.
Dearly beloved, believe not every spirit, but try the spirits if they are of God: for many false prophets have come out into the world.