1 Corinthians 5:11–13

[11] But now I am writing to you not to associate with anyone who bears the name of brother if he is guilty of sexual immorality or greed, or is an idolater, reviler, drunkard, or swindler—not even to eat with such a one. [12] For what have I to do with judging outsiders? Is it not those inside the church whom you are to judge? [13] God judges those outside. “Purge the evil person from among you.” (ESV)

1 Corinthians 6:1–2

Lawsuits Against Believers

[1] When one of you has a grievance against another, does he dare go to law before the unrighteous instead of the saints? [2] Or do you not know that the saints will judge the world? And if the world is to be judged by you, are you incompetent to try trivial cases? (ESV)