Proverbs 27:5
Open rebuke is better than secret love.
Proverbs 28:23
He who reproves a man later find more favor than he who flatters with the tongue.
Galatians 2:14
I saw that they did not walk uprightly according to the truth of the good news. Therefore I said to Cephas, in front of them all: If you, being a Jew, live as the nations do and not as the Jews, why do you compel the people of the nations to live like the Jews?
Leviticus 19:17
Never hate your brother in your heart. Be sure to correct your neighbor so that you will not be guilty of sinning along with him.
Matthew 18:15
If your brother does wrong to you, go to him in private. Clearly explain his error between you and him. If he listens to you, you have gained your brother back.
1 Timothy 5:20
Reprove the sinner in the sight of all, that the rest also may be in fear.