Romans 16:17-19

17Now I urge you, brothers and sisters, to watch out for those who create dissensions and obstacles contrary to the teaching that you learned. Avoid them!

18For these are the kind who do not serve our Lord Christ, but their own appetites. By their smooth talk and flattery they deceive the minds of the naive.

19Your obedience is known to all and thus I rejoice over you. But I want you to be wise in what is good and innocent in what is evil.