Matthew 24:4-5
4 Jesus answered: “Watch out that no one deceives you. 5 For many will come in my name, claiming, ‘I am the Christ,’ and will deceive many.
Matthew 24:11
11 and many false prophets will appear and deceive many people.
Matthew 24:23-24
23 At that time if anyone says to you, ‘Look, here is the Christ!’ or, ‘There he is!’ do not believe it. 24 For false Christs and false prophets will appear and perform great signs and miracles to deceive even the elect—if that were possible.
Mark 13:5-6
5 Jesus said to them: “Watch out that no one deceives you. 6 Many will come in my name, claiming, ‘I am he,’ and will deceive many.
Luke 21:8
8 He replied: “Watch out that you are not deceived. For many will come in my name, claiming, ‘I am he,’ and, ‘The time is near.’ Do not follow them.
Galatians 1:6-9
6 I am astonished that you are so quickly deserting the one who called you by the grace of Christ and are turning to a different gospel— 7 which is really no gospel at all. Evidently some people are throwing you into confusion and are trying to pervert the gospel of Christ. 8 But even if we or an angel from heaven should preach a gospel other than the one we preached to you, let him be eternally condemned! 9 As we have already said, so now I say again: If anybody is preaching to you a gospel other than what you accepted, let him be eternally condemned!
1 Timothy 1:2-4
2 To Timothy my true son in the faith: Grace, mercy and peace from God the Father and Christ Jesus our Lord. 3 As I urged you when I went into Macedonia, stay there in Ephesus so that you may command certain men not to teach false doctrines any longer 4 nor to devote themselves to myths and endless genealogies. These promote controversies rather than God’s work—which is by faith.
1 Timothy 4:1-7
1 The Spirit clearly says that in later times some will abandon the faith and follow deceiving spirits and things taught by demons. 2 Such teachings come through hypocritical liars, whose consciences have been seared as with a hot iron. 3 They forbid people to marry and order them to abstain from certain foods, which God created to be received with thanksgiving by those who believe and who know the truth. 4 For everything God created is good, and nothing is to be rejected if it is received with thanksgiving, 5 because it is consecrated by the word of God and prayer.
6 If you point these things out to the brothers, you will be a good minister of Christ Jesus, brought up in the truths of the faith and of the good teaching that you have followed. 7 Have nothing to do with godless myths and old wives’ tales; rather, train yourself to be godly.
1 Timothy 6:3-4
3 If anyone teaches false doctrines and does not agree to the sound instruction of our Lord Jesus Christ and to godly teaching, 4 he is conceited and understands nothing. He has an unhealthy interest in controversies and quarrels about words that result in envy, strife, malicious talk, evil suspicions
2 Timothy 4:2-4
2 Preach the Word; be prepared in season and out of season; correct, rebuke and encourage—with great patience and careful instruction. 3 For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. 4 They will turn their ears away from the truth and turn aside to myths.
Titus 1:8-9
8 Rather he must be hospitable, one who loves what is good, who is self-controlled, upright, holy and disciplined. 9 He must hold firmly to the trustworthy message as it has been taught, so that he can encourage others by sound doctrine and refute those who oppose it.
2 Peter 2:1-3
1 But 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 sovereign Lord who bought them—bringing swift destruction on themselves. 2 Many will follow their shameful ways and will bring the way of truth into disrepute. 3 In their greed these teachers will exploit you with stories they have made up. Their condemnation has long been hanging over them, and their destruction has not been sleeping.
Jude 1:4,10,12,13,18,19
4 For certain men whose condemnation was written about long ago have secretly slipped in among you. They are godless men, who change the grace of our God into a license for immorality and deny Jesus Christ our only Sovereign and Lord.
10 Yet these men speak abusively against whatever they do not understand; and what things they do understand by instinct, like unreasoning animals—these are the very things that destroy them.
12 These men are blemishes at your love feasts, eating with you without the slightest qualm—shepherds who feed only themselves. They are clouds without rain, blown along by the wind; autumn trees, without fruit and uprooted—twice dead. 13 They are wild waves of the sea, foaming up their shame; wandering stars, for whom blackest darkness has been reserved forever
18 They said to you, “In the last times there will be scoffers who will follow their own ungodly desires.” 19 These are the men who divide you, who follow mere natural instincts and do not have the Spirit.
1 John 4:1-3
1 Dear friends, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world. 2 This is how you can recognize the Spirit of God: Every spirit that acknowledges that Jesus Christ has come in the flesh is from God, 3 but every spirit that does not acknowledge Jesus is not from God. This is the spirit of the antichrist, which you have heard is coming and even now is already in the world.