1 Corinthians 5:9-6:8

9I wrote to you in my letter not to associate with sexually immoral people— 10not at all meaning the people of this world who are immoral, or the greedy and swindlers, or idolaters. In that case you would have to leave this world.

11But now I am writing to you that you must not associate with anyone who claims to be a brother or sister The Greek word for brother or sister (adelphos) refers here to a believer, whether man or woman, as part of God’s family; also in 8:11, 13. but is sexually immoral or greedy, an idolater or slanderer, a drunkard or swindler. Do not even eat with such people. 12What business is it of mine to judge those outside the church? Are you not to judge those inside? 13God will judge those outside. “Expel the wicked person from among you.” Deut. 13:5; 17:7; 19:19; 21:21; 22:21,24; 24:7

Lawsuits Among Believers 1If any of you has a dispute with another, do you dare to take it before the ungodly for judgment instead of before the Lord’s people? 2Or do you not know that the Lord’s people will judge the world? And if you are to judge the world, are you not competent to judge trivial cases? 3Do you not know that we will judge angels? How much more the things of this life! 4Therefore, if you have disputes about such matters, do you ask for a ruling from those whose way of life is scorned in the church? 5I say this to shame you. Is it possible that there is nobody among you wise enough to judge a dispute between believers?

6But instead, one brother takes another to court—and this in front of unbelievers! 7The very fact that you have lawsuits among you means you have been completely defeated already. Why not rather be wronged? Why not rather be cheated? 8Instead, you yourselves cheat and do wrong, and you do this to your brothers and sisters.