Matthew 7:1-2 (also Luke 6:37)
"Do not judge, or you too will be judged. For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you."
1 Corinthians 5:12
What business is it of mine to judge those outside the church? Are you not to judge those inside?
1 Corinthians 6:2-4
Do you not know that the saints will judge the world? And if you are to judge the world, are you not competent to judge trivial cases? Do you not know that we will judge angels? How much more the things of this life! Therefore, if you have disputes about such matters, appoint as judges even men of little account in the church!