Matthew 7:15-17
"Beware of the false prophets, who come to you disguised as sheep but are ravenous wolves underneath.
John 3:19-21
And the basis of the judgment is this, that the light has come into the world, and yet, because their actions were wicked, men have loved the darkness more than the light.
2 Corinthians 11:13-15
Such men are sham apostles, dishonest workmen, masquerading as apostles of Christ.
2 Thessalonians 2:9-11
The other's appearance, by the contrivance of Satan, will be full of power and pretended signs and wonders,
2 Timothy 4:3-4
For a time will come when they will not listen to wholesome instruction, but will overwhelm themselves with teachers to suit their whims and tickle their fancies,
2 Peter 2:1-2
There were false prophets too among the people, just as there will be false teachers among you, who will introduce destructive sects and deny the Master who has bought them, thus bringing on themselves swift destruction.