2 Corinthians 7:8

And you have become puffed up and have not mourned instead, so that the one who had done this deed would be removed from your midst.

For if I cause you sorrow, who then makes me glad but the one whom I made sorrowful?

And this is the very thing I wrote you, so that when I came, I would not have sorrow from those who ought to make me rejoice; having confidence in you all that my joy would be the joy of you all.

For out of much affliction and anguish of heart I wrote to you with many tears; not so that you would be made sorrowful, but that you might know the love which I have abundantly for you.

So although I wrote to you, it was not for the sake of the offender nor for the sake of the one offended, but that your earnestness on our behalf might be manifested to you in the sight of God.