And perhaps we need not wonder at such conduct in Agesilaüs, since when he learned that a great battle had been fought near Corinth, and that men of the highest repute had suddenly been taken off, and that although few Spartans altogether had been killed, the loss of their enemies was very heavy, he was not seen to be rejoiced or elated, but fetched a deep groan and said: ‘Alas for Hellas, which has by her own hands destroyed so many brave men! Had they lived, they could have conquered in battle all the Barbarians in the world.’
Edition :
Plutarch Lives V: Agesilaus and Pompey, Pelopidas and Marcellus, Ed. Jeffrey Henderson, trans. Bernadotte Perrin (The Loeb Classical Library 87), Harvard University Press: Cambridge/MA - London 1961 (first ed. 1917).