cum seditiones militares pateretur, milites saepius decimavit, aliquando etiam centesimavit, quod verbum proprium ipsius est, cum se clementem diceret, quando eos centesimaret qui digni essent decimatione atque vicensimatione.
Translation :
and when he had to deal with a mutiny among the troops, he usually decimated the soldiers — but sometimes he only centimated them. This last was an expression of his own, for he used to say that he was merciful in putting to death only one in a hundred, whereas they deserved to have one in ten or one in twenty put to death.
Edition :
Historia Augusta, Volume II: Caracalla. Geta. Opellius Macrinus. Diadumenianus. Elagabalus. Severus Alexander. The Two Maximini. The Three Gordians. Maximus and Balbinus. Translated by David Magie. Loeb Classical Library 140. Cambridge, MA: Harvard University Press, 1924
