Whoever does wrong, wrongs himself first.

The source

"Whoever does wrong, wrongs himself first." Marcus Aurelius said it in Meditations 9.4. Translated by George Long, 1862.

"He who does wrong does wrong against himself"

George Long, 1862, Meditations 9.4.

Who said it

Marcus Aurelius (121–180 AD). Roman emperor who wrote private notes to himself on a military campaign. We know them as the Meditations.

Questions

Who said "Whoever does wrong, wrongs himself first."?

Marcus Aurelius (121–180 AD). Source: Meditations 9.4.

What is the original wording?

He who does wrong does wrong against himself (George Long, 1862). Translated by George Long, 1862.