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.
Matthew 24:11
Many false prophets will rise up and lead multitudes astray;
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.
Mark 13:22
For there will rise up false Christs and false prophets, displaying signs and prodigies with a view to lead astray--if indeed that were possible--even God's own People.
Luke 6:26
"Alas for you when men shall all have spoken well of you; for that is just the way their forefathers behaved to the false Prophets!
2 Thessalonians 2:9
The appearing of the Lawless one will be attended by various miracles and tokens and delusive marvels--for so Satan works--
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.
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.