The doctrine that you can loose your salvation.
1 Ti 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;
1 Ti 4:2 Speaking lies in hypocrisy; having their conscience seared with a hot iron;
1 Ti 4:3 Forbidding to marry,and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth.