Deuteronomy 18:20-22
But if any prophet dares to speak a message in My name that I have not commanded him to speak, or to speak in the name of other gods, that prophet must be put to death.” / You may ask in your heart, “How can we recognize a message that the LORD has not spoken?” / When a prophet speaks in the name of the LORD and the message does not come to pass or come true, that is a message the LORD has not spoken. The prophet has spoken presumptuously. Do not be afraid of him.

Ezekiel 13:6-9
They see false visions and speak lying divinations. They claim, ‘Thus declares the LORD,’ when the LORD did not send them; yet they wait for the fulfillment of their message. / Haven’t you seen a false vision and spoken a lying divination when you proclaim, ‘Thus declares the LORD,’ even though I have not spoken? / Therefore this is what the Lord GOD says: Because you have uttered vain words and seen false visions, I am against you, declares the Lord GOD. ...

Matthew 7:15-20
Beware of false prophets. They come to you in sheep’s clothing, but inwardly they are ravenous wolves. / By their fruit you will recognize them. Are grapes gathered from thornbushes, or figs from thistles? / Likewise, every good tree bears good fruit, but a bad tree bears bad fruit. ...

2 Peter 2:1-3
Now there were also false prophets among the people, just as there will be false teachers among you. They will secretly introduce destructive heresies, even denying the Master who bought them—bringing swift destruction on themselves. / Many will follow in their depravity, and because of them the way of truth will be defamed. / In their greed, these false teachers will exploit you with deceptive words. The longstanding verdict against them remains in force, and their destruction does not sleep.

1 John 4:1
Beloved, do not believe every spirit, but test the spirits to see whether they are from God. For many false prophets have gone out into the world.

Isaiah 30:9-11
These are rebellious people, deceitful children, children unwilling to obey the LORD’s instruction. / They say to the seers, “Stop seeing visions!” and to the prophets, “Do not prophesy to us the truth! Speak to us pleasant words; prophesy illusions. / Get out of the way; turn off the road. Rid us of the Holy One of Israel!”

Micah 3:5-7
This is what the LORD says: “As for the prophets who lead My people astray, who proclaim peace while they chew with their teeth, but declare war against one who puts nothing in their mouths: / Therefore night will come over you without visions, and darkness without divination. The sun will set on these prophets, and the daylight will turn black over them. / Then the seers will be ashamed and the diviners will be disgraced. They will all cover their mouths because there is no answer from God.”

2 Timothy 4:3-4
For the time will come when men will not tolerate sound doctrine, but with itching ears they will gather around themselves teachers to suit their own desires. / So they will turn their ears away from the truth and turn aside to myths.

1 Kings 22:21-23
Then a spirit came forward, stood before the LORD, and said, ‘I will entice him.’ ‘By what means?’ asked the LORD. / And he replied, ‘I will go out and be a lying spirit in the mouths of all his prophets.’ ‘You will surely entice him and prevail,’ said the LORD. ‘Go and do it.’ / So you see, the LORD has put a lying spirit in the mouths of all these prophets of yours, and the LORD has pronounced disaster against you.”

Zechariah 10:2
For idols speak deceit and diviners see illusions; they tell false dreams and offer empty comfort. Therefore the people wander like sheep, oppressed for lack of a shepherd.

Matthew 24:11
and many false prophets will arise and deceive many.

2 Corinthians 11:13-15
For such men are false apostles, deceitful workers, masquerading as apostles of Christ. / And no wonder, for Satan himself masquerades as an angel of light. / It is not surprising, then, if his servants masquerade as servants of righteousness. Their end will correspond to their actions.

Acts 20:29-30
I know that after my departure, savage wolves will come in among you and will not spare the flock. / Even from your own number, men will rise up and distort the truth to draw away disciples after them.

Romans 16:17-18
Now I urge you, brothers, to watch out for those who create divisions and obstacles that are contrary to the teaching you have learned. Turn away from them. / For such people are not serving our Lord Christ, but their own appetites. By smooth talk and flattery they deceive the hearts of the naive.

Isaiah 28:7-8
These also stagger from wine and stumble from strong drink: Priests and prophets reel from strong drink and are befuddled by wine. They stumble because of strong drink, muddled in their visions and stumbling in their judgments. / For all their tables are covered with vomit; there is not a place without filth.