Friedrich von Logau, Retribution. From the Sinngedichte. See Longfellow's translation. Poetic Aphorisms. First line from the Greek Oracula Sibyllina, VIII. 14. Same idea in Plutarch, Sera Humanis Vindicta, Chapter VIII, quoting Sextus Empiricus, Adversus Grammaticos, I. 13. Sect. 287. Found also in Proverbia e cad. Coisl. in Gaisford, Parœm. Græc. Oxon. 1836, p. 164. Horace, Carmina, III. 2. 31. Tibullus, Elegies, I. 9.https://en.wikiquote.org/wiki/Retribution