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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And then the king of Israel gathered of the Prophets together, upon a four hundred men, and said unto them, "Shall I go to Ramoth in Gilead to battle, or be still?" And they said, "Go: for the Lord shall deliver it into the hands of the king."
And therefore the LORD of Hosts giveth you this warning, "Hear not the words of the prophets, that preach unto you, and deceive you: for they speak the meaning of their own heart, and not out of the mouth of the LORD.
And this was done in the same year: even in the beginning of the reign of Zedekiah, king of Judah. But in the fourth year of the reign of Zedekiah king of Judah, in the fifth Month, it happened, that Hananiah the son of Azzur, the prophet of Gibeon, spake to me in the house of the LORD, in the presence of the priests and of all the people, and said,
Thus hath the LORD of Hosts the God of Israel spoken, of Ahab the son of Kolaiah, and of Zedekiah the son of Maaseiah, which prophesy lies unto you in my name: Behold, I will deliver them into the hand of Nebuchadnezzar the king of Babylon, that he may slay them before your eyes.
"Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves.
Ye beloved, believe not every spirit: but prove the spirits whether they be of God, or not: for many false prophets are gone out in to the world.