5 Bible Verses about Teachers, Of False Doctrines

I exhort you, brothers, to keep watch of those who are causing the divisions among you, and occasions of stumbling, contrary to the teaching which you have learned. Turn away from them. For men of that stamp are not the slaves of Christ, but are slaves to their own appetites. By their smooth and fair speech they beguile the hearts of the innocent.

and that from among your own number, men will arise, perverting the truth, to draw away the disciples after them.

Then there will be many who will follow their immorality, because of whom the Way of the Truth will be maligned.

Now the Spirit distinctly declares that in latter days there will be some who will fall away from the faith, by listening to spirits of error, and to teachings of demons

I am amazed that you are so soon shifting your ground, and deserting him who called you by the grace of Christ, for another gospel, which indeed is not another; only there are certain individuals who are troubling you, and desiring to pervert the gospel of Christ.