Marcus Aurelius
Meditations 8.42
It is not fit that I should give myself pain, for I have never intentionally given pain even to another.
Marcus Aurelius, Meditations 8.42, translated by George Long
It were not right that I should pain myself for not even another have I ever knowingly pained.
Marcus Aurelius, Meditations 8.42, translated by C. R. Haines