But the prophet who presumes to speak a word in my name which I have not commanded him to speak, or who speaks in the name of other gods, that same prophet shall die.' And if you say in your heart, `How may we know the word which the LORD has not spoken?' -- when a prophet speaks in the name of the LORD, if the word does not come to pass or come true, that is a word which the LORD has not spoken; the prophet has spoken it presumptuously, you need not be afraid of him.
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They have spoken falsehood and divined a lie; they say, `Says the LORD,' when the LORD has not sent them, and yet they expect him to fulfil their word. Have you not seen a delusive vision, and uttered a lying divination, whenever you have said, `Says the LORD,' although I have not spoken?" Therefore thus says the Lord God: "Because you have uttered delusions and seen lies, therefore behold, I am against you, says the Lord GOD. My hand will be against the prophets who see delusive visions and who give lying divinations; they shall not be in the council of my people, nor be enrolled in the register of the house of Israel, nor shall they enter the land of Israel; and you shall know that I am the Lord GOD.
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He who speaks the truth gives honest evidence, but a false witness utters deceit.
If a ruler listens to falsehood, all his officials will be wicked.
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But false prophets also arose among the people, just as there will be false teachers among you, who will secretly bring in destructive heresies, even denying the Master who bought them, bringing upon themselves swift destruction. And many will follow their licentiousness, and because of them the way of truth will be reviled. And in their greed they will exploit you with false words; from of old their condemnation has not been idle, and their destruction has not been asleep.