Matthew 7:15-17
"Look out for false prophets, who come to you under the guise of sheep, but inside they are devouring wolves.
John 3:19-21
And the ground for the sentence is this, that the light has come into the world, and yet, because their actions were evil, men have loved darkness more than the light.
2 Corinthians 11:13-15
For such men are sham apostles, dishonest workmen, masquerading as apostles of Christ.
2 Thessalonians 2:9-11
that is, the representative of lawlessness, whose coming is in accordance with the working of Satan, with his plenitude of power and pretended signs and wonders,
2 Timothy 4:3-4
For a time will come when they will not listen to wholesome teaching, but to gratify their own evil desires will surround themselves with teachers who teach to gratify their own evil desires, because their ears are itching so to be tickled,
2 Peter 2:1-2
Now there were false prophets among the people, just as there will be false teachers among you too, who will insidiously introduce destructive heresies and deny the Master who has bought them, thus bringing on themselves swift destruction.