Because
Jeremiah 29:9
For they prophesy falsely unto you in my name: I have not sent them, saith the LORD.
Jeremiah 29:23
Because they have committed villany in Israel, and have committed adultery with their neighbours' wives, and have spoken lying words in my name, which I have not commanded them; even I know, and am a witness, saith the LORD.
Jeremiah 14:14
Then the LORD said unto me, The prophets prophesy lies in my name: I sent them not, neither have I commanded them, neither spake unto them: they prophesy unto you a false vision and divination, and a thing of nought, and the deceit of their heart.
Jeremiah 14:15
Therefore thus saith the LORD concerning the prophets that prophesy in my name, and I sent them not, yet they say, Sword and famine shall not be in this land; By sword and famine shall those prophets be consumed.
Jeremiah 23:21
I have not sent these prophets, yet they ran: I have not spoken to them, yet they prophesied.
Jeremiah 28:15-17
15
Then said the prophet Jeremiah unto Hananiah the prophet, Hear now, Hananiah; The LORD hath not sent thee; but thou makest this people to trust in a lie.
16
Therefore thus saith the LORD; Behold, I will cast thee from off the face of the earth: this year thou shalt die, because thou hast taught rebellion against the LORD.
17
So Hananiah the prophet died the same year in the seventh month.
Ezekiel 13:8-16
8
Therefore thus saith the Lord GOD; Because ye have spoken vanity, and seen lies, therefore, behold, I am against you, saith the Lord GOD.
9
And mine hand shall be upon the prophets that see vanity, and that divine lies: they shall not be in the assembly of my people, neither shall they be written in the writing of the house of Israel, neither shall they enter into the land of Israel; and ye shall know that I am the Lord GOD.
10
Because, even because they have seduced my people, saying, Peace; and there was no peace; and one built up a wall, and, lo, others daubed it with untempered morter:
11
Say unto them which daub it with untempered morter, that it shall fall: there shall be an overflowing shower; and ye, O great hailstones, shall fall; and a stormy wind shall rend it.
12
Lo, when the wall is fallen, shall it not be said unto you, Where is the daubing wherewith ye have daubed it?
13
Therefore thus saith the Lord GOD; I will even rend it with a stormy wind in my fury; and there shall be an overflowing shower in mine anger, and great hailstones in my fury to consume it.
14
So will I break down the wall that ye have daubed with untempered morter, and bring it down to the ground, so that the foundation thereof shall be discovered, and it shall fall, and ye shall be consumed in the midst thereof: and ye shall know that I am the LORD.
15
Thus will I accomplish my wrath upon the wall, and upon them that have daubed it with untempered morter, and will say unto you, The wall is no more, neither they that daubed it;
16
To wit, the prophets of Israel which prophesy concerning Jerusalem, and which see visions of peace for her, and there is no peace, saith the Lord GOD.
Ezekiel 13:22-16
Ezekiel 13:23-16
2 Peter 2:1
But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.