2 Corinthians 11:13-15
For such men are false apostles, deceitful workers, transforming themselves into apostles of Christ;
Galatians 2:4
and that was because of the false brethren secretly introduced, who, indeed, crept in to spy out 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 also do these withstand the truth; men utterly corrupted in mind, disapproved concerning the faith.
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: