Acts 19:33-34
The Jews in the crowd pushed Alexander forward to explain himself, and he motioned for silence so he could make his defense to the people. / But when they realized that he was a Jew, they all shouted in unison for about two hours: “Great is Artemis of the Ephesians!”

1 Timothy 1:20
Among them are Hymenaeus and Alexander, whom I have handed over to Satan to be taught not to blaspheme.

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.

Galatians 1:7-9
which is not even a gospel. Evidently some people are troubling you and trying to distort the gospel of Christ. / But even if we or an angel from heaven should preach a gospel contrary to the one we preached to you, let him be under a curse! / As we have said before, so now I say again: If anyone is preaching to you a gospel contrary to the one you received, let him be under a curse!

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.

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.

Matthew 7:15
Beware of false prophets. They come to you in sheep’s clothing, but inwardly they are ravenous wolves.

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.

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.

2 Thessalonians 3:14-15
Take note of anyone who does not obey the instructions we have given in this letter. Do not associate with him, so that he may be ashamed. / Yet do not regard him as an enemy, but admonish him as a brother.

Titus 3:10-11
Reject a divisive man after a first and second admonition, / knowing that such a man is corrupt and sinful; he is self-condemned.

1 Corinthians 5:11
But now I am writing you not to associate with anyone who claims to be a brother but is sexually immoral or greedy, an idolater or a verbal abuser, a drunkard or a swindler. With such a man do not even eat.

Jeremiah 23:16
This is what the LORD of Hosts says: “Do not listen to the words of the prophets who prophesy to you. They are filling you with false hopes. They speak visions from their own minds, not from the mouth of the LORD.

Ezekiel 13:9
My hand will be against the prophets who see false visions and speak lying divinations. They will not belong to the council of My people or be recorded in the register of the house of Israel, nor will they enter the land of Israel. Then you will know that I am the Lord GOD.

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!”