So when his army was ready, he put on his armour, went out to battle, and made a vow to Heracles that he would institute games and a sacrifice in his honour, if the god would render him in the sight of the Sicilian Greeks an antagonist worthy of his lineage and resources;
Edition :
Plutarch Lives IX: Demetrius and Antony, Pyrrhus and Caius Marius, Ed. Jeffrey Henderson, trans. Bernadotte Perrin (The Loeb Classical Library 101), Harvard University Press: Cambridge/MA - London 1968 (first ed. 1920).