Matthew 7:15-17
"Beware of false prophets, who, indeed, come to you in sheep's clothing, but within are ravening wolves.
John 3:19-21
And this is the judgment, that the Light hath come into the world, and men loved the darkness rather than the Light; for their works were evil.
2 Corinthians 11:13-15
For such men are false apostles, deceitful workers, transforming themselves into apostles of Christ;
2 Thessalonians 2:9-11
him whose coming is according to the working of Satan in all power and signs and lying wonders,
2 Timothy 4:3-4
For there will be a time when they will not endure the healthful teaching; but, having itching ears, they will for themselves heap up teachers according to their own desires;
2 Peter 2:1-2
But there arose false prophets also among the people, as among you also there will be false teachers, who, indeed, will stealthily bring in destructive heresies, denying even the Master Who bought them, bringing upon themselves swift destruction: