Bible Verses about Judging Between Brethren
1 Corinthians 6:2-3
Do you not know that the saints will judge the world? And if the world will be judged by you, are you unworthy to judge the smallest matters? Do you not know that we shall judge angels? How much more, things that pertain to this life?
And why do you look at the speck in your brother's eye, but do not consider the plank in your own eye? Or how can you say to your brother, "Let me remove the speck from your eye"; and look, a plank is in your own eye? Hypocrite! First remove the plank from your own eye, and then you will see clearly to remove the speck from your brother's eye.