1 Corinthians 6:1-6

Does any one of you, when he has a complaint (civil dispute) with another [believer], dare to go to law before unrighteous men (non-believers) instead of [placing the issue] before the saints (God’s people)? Do you not know that the saints (God’s people) will [one day] judge the world? If the world is to be judged by you, are you not competent to try trivial (insignificant, petty) cases? Do you not know that we [believers] will judge angels? How much more then [as to] matters of this life? So if you have lawsuits dealing with matters of this life, are you appointing those as judges [to hear disputes] who are of no account in the church? I say this to your shame. Can it be that there is not one wise man among you who [is governed by integrity and] will be able and competent to decide [private disputes] between his fellow believers, but instead, brother goes to law against brother, and that before [judges who are] unbelievers?