2 Corinthians 7:8-9; 2 Corinthians 7:12-13
For even if I made you sorry with my letter, I do not regret it; though I did regret it. For I perceive that the same epistle made you sorry, though only for a while.
Now I rejoice, not that you were made sorry, but that your sorrow led to repentance. For you were made sorry in a godly manner, that you might suffer loss from us in nothing.
Therefore, although I wrote to you, I did not do it for the sake of him who had done the wrong, nor for the sake of him who suffered wrong, but that our care for you in the sight of God might appear to you.
Therefore we have been comforted in your comfort. And we rejoiced exceedingly more for the joy of Titus, because his spirit has been refreshed by you all.