2 Corinthians 7:8-9; 2 Corinthians 7:12-13

8 For although I made you sorrowful by my epistle, I do not repent. And if I did repent, seeing that the same epistle (although but for a time) did make you sorrowful,

9 Now I am glad: not because you were made sorrowful, but because you were made sorrowful unto penance. For you were made sorrowful according to God, that you might suffer damage by us in nothing.

12 Wherefore although I wrote to you, it was not for his sake that did the wrong, nor for him that suffered it: but to manifest our carefulness that we have for you

13 Before God: therefore we were comforted. But in our consolation we did the more abundantly rejoice for the joy of Titus, because his spirit was refreshed by you all.