ROM 16:17. Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.

GAL 1:8. But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.

GAL 1:9. As we said before, so say I now again, if any man preach any other gospel unto you than that ye have received, let him be accursed.

1TIM 4:1. Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils;

1TIM 4:2. Speaking lies in hypocrisy; having their conscience seared with a hot iron;

1TIM 6:3. If any man teach otherwise, and consent not to wholesome words, even the words of our Lord Jesus Christ, and to the doctrine which is according to godliness;

1TIM 6:4. He is proud, knowing nothing, but doting about questions and strifes of words, whereof cometh envy, strife, railings, evil surmisings,

1TIM 6:5. Perverse disputings of men of corrupt minds, and destitute of the truth, supposing that gain is godliness: from such withdraw thyself.

TIT 1:10. For there are many unruly and vain talkers and deceivers, specially they of the circumcision:

TIT 1:11. Whose mouths must be stopped, who subvert whole houses, teaching things which they ought not, for filthy lucre's sake.

HEB 13:9. Be not carried about with divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein.

2PE 2:1. But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.

2PE 2:2. And many shall follow their pernicious ways; by reason of whom the way of truth shall be evil spoken of.

2TIM 4:3. For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears;

2TIM 4:4. And they shall turn away their ears from the truth, and shall be turned unto fables.

ACT 20:29. For I know this, that after my departing shall grievous wolves enter in among you, not sparing the flock.