1 Corinthians 6:1-6

1 If any of you have a dispute with another Christian, how dare you go before heathen judges instead of letting God's people settle the matter?
2 Don't you know that God's people will judge the world? Well, then, if you are to judge the world, aren't you capable of judging small matters?
3 Do you not know that we shall judge the angels? How much more, then, the things of this life!
4 If such matters come up, are you going to take them to be settled by people who have no standing in the church?
5 Shame on you! Surely there is at least one wise person in your fellowship who can settle a dispute between fellow Christians.
6 Instead, one Christian goes to court against another and lets unbelievers judge the case!