Matthew 18:17
And if he refuses to listen to the church, treat him as a heathen and as a tax-collector.
2 Corinthians 5:16
So from this moment on, I do not estimate anybody by the standard of outward appearances. Although I once did estimate Christ by this standard, I do not do so any longer.
Galatians 2:11
Now when Cephas came to Antioch, I opposed him to his face, because he stood condemned.
1 Timothy 5:20
Those who are guilty reprove in public, so that others may be warned.
Titus 2:15
You must continue teaching this, and continue exhorting and reproving people, with full authority. Let no one belittle you.