2 Corinthians 11:13-15
For such are false apostles, deceitful workers, transformed into apostles of Christ.
Galatians 2:4
and that because of the false brethren clandestinely introduced, who had crept in as spies upon our liberty, which we have in Christ Jesus, that they might bring us into bondage:
2 Timothy 3:8
And as Jannes and Jambres withstood Moses, so do these also withstand the truth; being men of corrupt minds, and of no judgement in the faith.
2 Peter 2:1-2
But there were indeed false prophets among the people of old, as there will be also among you false teachers, who will privately introduce pernicious heresies, denying even the Lord that bought them, and bringing upon themselves swift destruction,