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.
2 Timothy 4:3
For a time is coming when they will not tolerate wholesome instruction, but, wanting to have their ears tickled, they will find a multitude of teachers to satisfy their own fancies;
2 Peter 2:1-3
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.