Xenophon,
Anabasis — Book 7, Chapter 4
“ So Seuthes summoned Xenophon and explained their proposals, adding that he should make no terms with them, if Xenophon wished to punish them for their night attack. The latter replied: "For my part, I should think their punishment is great enough already, if they are to be slaves instead of free men; still," he added, "I advise you for the future to take as hostages those who are most capable of doing mischief, and to let the old men abide in peace at home." ”
