Matthew 16:6 “Be careful,” Jesus said to them. “Be on your guard against the yeast of the Pharisees and Sadducees.”

Matthew 24:4-5 Jesus answered: “Watch out that no one deceives you. For many will come in my name, claiming, ‘I am the Christ,’ and will deceive many.

Matthew 24:11 and many false prophets will appear and deceive many people.

Mark 12:38-40 As he taught, Jesus said, “Watch out for the teachers of the law. They like to walk around in flowing robes and be greeted in the marketplaces, and have the most important seats in the synagogues and the places of honor at banquets. They devour widows’ houses and for a show make lengthy prayers. Such men will be punished most severely.”

Luke 21:8 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.

1 Corinthians 3:18 Do not deceive yourselves. . . .

1 Corinthians 6:9  . . . Do not be deceived: . . .

1 Corinthians 15:33 Do not be misled . . .

2 Corinthians 11:3 But I am afraid that just as Eve was deceived by the serpent’s cunning, your minds may somehow be led astray . . .

2 Corinthians 11:13 For such men are false apostles, deceitful workmen, masquerading as apostles of Christ.

Galatians 1:7-8  . . . Evidently some people are throwing you into confusion and are trying to pervert the gospel of Christ. 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!

Galatians 2:4 This matter arose because some false brothers had infiltrated our ranks to spy on the freedom we have in Christ Jesus and to make us slaves.

Galatians 6:3 If anyone thinks he is something when he is nothing, he deceives himself.

Galatians 6:7 Do not be deceived . . .

Ephesians 4:14 Then we will no longer be infants, tossed back and forth by the waves, and blown here and there by every wind of teaching and by the cunning and craftiness of men in their deceitful scheming.

Ephesians 5:6 Let no one deceive you with empty words . . .

Colossians 2:4 I tell you this so that no one may deceive you by fine-sounding arguments.

Colossians 2:8 See to it that no one takes you captive through hollow and deceptive philosophy, which depends on human tradition and the basic principles of this world rather than on Christ.

2 Timothy 2:17-18 Their teaching will spread like gangrene. Among them are Hymenaeus and Philetus, who have wandered away from the truth. They say that the resurrection has already taken place, and they destroy the faith of some.

2 Timothy 3:5-6 having a form of godliness but denying its power. Have nothing to do with them. They are the kind who worm their way into homes and gain control over weak-willed women, who are loaded down with sins and are swayed by all kinds of evil desires,

1 Timothy 4:1-2 The Spirit clearly says that in later times some will abandon the faith and follow deceiving spirits and things taught by demons. Such teachings come through hypocritical liars, whose consciences have been seared as with a hot iron.

2 Timothy 4:3 For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears . . .

2 Timothy 4:14-15 Alexander the metalworker did me a great deal of harm.  . . . You too should be on your guard against him, because he strongly opposed our message.

2 Thessalonians 2:3 Don’t let anyone deceive you in any way . . .

Titus 1:10-11,16 For there are many rebellious people, mere talkers and deceivers, especially those of the circumcision group. They must be silenced, because they are ruining whole households by teaching things they ought not to teach – and that for the sake of dishonest gain. They claim to know God, but by their actions they deny him. They are detestable, disobedient and unfit for doing anything good.

Hebrews 3:13 But encourage one another daily, . . . so that none of you may be hardened by sin’s deceitfulness.

James 1:16 Don’t be deceived, my dear brothers.

James 1:22 Dear children, do not let anyone lead you astray. . . .

James 1:26 If anyone considers himself religious and yet does not keep a tight rein on his tongue, he deceives himself . . .

2 Peter 2:1-3 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. Many will follow their shameful ways and will bring the way of truth into disrepute. 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.

2 Peter 2:18-19 For they mouth empty, boastful words and, by appealing to the lustful desires of sinful human nature, they entice people who are just escaping from those who live in error. They promise them freedom, while they themselves are slaves of depravity – for a man is a slave to whatever has mastered him.

1 John 1:8 If we claim to be without sin, we deceive ourselves and the truth is not in us.

1 John 3:7 Do not merely listen to the word, and so deceive yourselves.

1 John 4:1 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 John 1:7 Many deceivers, who do not acknowledge Jesus Christ as coming in the flesh, have gone out into the world. . . .

Revelation 2:14-16 Nevertheless, I have a few things against you: You have people there who hold to the teaching of Balaam . . . Likewise you also have those who hold to the teaching of the Nicolaitans. Repent therefore! Otherwise, I will soon come to you and will fight against them with the sword of my mouth.