2 Corinthians 11:13-15
Such men are sham apostles, dishonest workmen, masquerading as apostles of Christ.
Galatians 2:4
to gratify the false brothers who had been smuggled in, who sneaked in to spy upon the freedom we enjoy in Christ Jesus, so as to reduce us to slavery again.
2 Timothy 3:8
Just as Jannes and Jambres opposed Moses, these people in turn oppose the truth; they are men of depraved minds and counterfeit faith.
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.