2 Thessalonians 3:6

“And if he refuses to listen to them, tell it to the church; and if he refuses to listen even to the church, let him be to you as the Gentile and the tax collector.

Now I urge you, brothers, to keep your eye on those who cause dissensions and stumblings contrary to the teaching which you learned, and turn away from them.

in the name of our Lord Jesus, when you are assembled, and I with you in spirit, with the power of our Lord Jesus,

I wrote you in my letter not to associate with sexually immoral people;

But now I am writing to you not to associate with any so-called brother if he is a sexually immoral person, or greedy, or an idolater, or a reviler, or a drunkard, or a swindler—not even to eat with such a one.

Now I praise you because you remember me in everything and hold firmly to the traditions, just as I delivered them to you.

And we urge you, brothers, admonish the unruly, encourage the fainthearted, help the weak, be patient with everyone.

So then, brothers, stand firm and hold to the traditions which you were taught, whether by word of mouth or by letter from us.

For we hear that some among you are walking in an unruly manner, doing no work at all, but acting like busybodies.

And if anyone does not obey our word in this letter, take special note of that person to not associate with him, so that he will be put to shame.

And yet do not regard him as an enemy, but admonish him as a brother.

holding to a form of godliness, but having denied its power. Keep away from such men as these.

If anyone comes to you and does not bring this teaching, do not receive him into your house, and do not give him a greeting,