2 Corinthians 11:13-15
Such men are sham apostles, dishonest workmen, masquerading as apostles of Christ.
Matthew 7:15
"Beware of the false prophets, who come to you disguised as sheep but are ravenous wolves underneath.
Philippians 3:2
Look out for those dogs, those mischief-makers, with their amputation!
2 Peter 2:1-3
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.
1 John 4:1
Dear friends, do not believe every inspired utterance, but test the utterances to see whether they come from God, for many false prophets have come out into the world.