Galatians 2:14

But when I saw that they were not walking uprightly according to the truth of the gospel, I said to Cephas in the presence of all, If thou, being a Jew, livest after the manner of gentiles, and not that of the Jews, how is it that thou compellest the gentiles to keep the customs of the Jews?

Matthew 18:15

Moreover, if thy brother sin, go and reprove him between thee and him alone. If he listen to thee, thou hast gained thy brother;

1 Timothy 5:20

Those that sin rebuke before all, that the rest also may fear.

Treasury of Scripture Knowledge

Summary

Open rebuke is better than secret love.

Bible References

General references

Matthew 18:15
Moreover, if thy brother sin, go and reprove him between thee and him alone. If he listen to thee, thou hast gained thy brother;
Galatians 2:14
But when I saw that they were not walking uprightly according to the truth of the gospel, I said to Cephas in the presence of all, If thou, being a Jew, livest after the manner of gentiles, and not that of the Jews, how is it that thou compellest the gentiles to keep the customs of the Jews?
1 Timothy 5:20
Those that sin rebuke before all, that the rest also may fear.