2 Corinthians 7:8-9 RSV

8 For even if I made you sorry with my letter, I do not regret it (though I did regret it), for I see that that letter grieved you, though only for a while.
9 As it is, I rejoice, not because you were grieved, but because you were grieved into repenting; for you felt a godly grief, so that you suffered no loss through us.