Matthew 18:17
If he refuses to listen to them, tell the congregation. And if he refuses to listen to it, treat him as a heathen or a tax-collector.
2 Corinthians 5:16
So from that time on, I have estimated nobody at what he seemed to be outwardly; even though I once estimated Christ in that way, I no longer do so.
Galatians 2:11
But when Cephas came to Antioch, I opposed him to his face, for his own conduct condemned him.
1 Timothy 5:20
Those who are found guilty you must reprove publicly, as a warning to others.
Titus 2:15
This is what you must teach and urge and insist upon with full authority. No one is to look down on you.