King James Version
For though I made you sorry with a letter, I do not repent, though I did repent: for I perceive that the same epistle hath made you sorry, though it were but for a season.English Standard Version
For even if I made you grieve 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.New International Version
Even if I caused you sorrow by my letter, I do not regret it. Though I did regret it--I see that my letter hurt you, but only for a little while--