Matthew 7:15
"Beware of the false teachers--men who come to you in sheep's fleeces, but beneath that disguise they are ravenous wolves.
1 John 4:1
Dear friends, do not believe every spirit, but put the spirits to the test to see whether they are from God; for many false teachers have gone out into the world.
Matthew 24:24
For there will rise up false Christs and false prophets, displaying wonderful signs and prodigies, so as to deceive, were it possible, even God's own People.
Romans 16:18
For men of that stamp are not bondservants of Christ our Lord, but are slaves to their own appetites; and by their plausible words and their flattery they utterly deceive the minds of the simple.
2 Corinthians 11:3
But I am afraid that, as the serpent in his craftiness deceived Eve, so your minds may be led astray from their single-heartedness and their fidelity to Christ.
2 Corinthians 11:13-15
For men of this stamp are sham apostles, dishonest workmen, assuming the garb of Apostles of Christ.
2 Peter 2:1
But there were also false prophets among the people, as there will be teachers of falsehood among you also, who will cunningly introduce fatal divisions, disowning even the Sovereign Lord who has redeemed them, and bringing on themselves swift destruction.
Revelation 19:20
who had done the miracles in his presence with which he had led astray those who had received the mark of the Wild Beast, and those who worshipped his statue. Both of them were thrown alive into the Lake of fire that was all ablaze with sulphur.