Anabasis

On the next day, accordingly, Seuthes gave over the hostages—men already elderly and the most powerful, so it was said, of the mountaineers—and came himself with his troops. Now by this time Seuthes had a force quite three times as large as before; for many of the Odrysians, hearing what success Seuthes was enjoying, came down from the upper country to take service with him.

And when the Thynians saw from their mountain masses of hoplites, masses of peltasts, and troops of horsemen, they descended and besought him to grant them a truce, agreeing to do anything and everything and urging him to receive pledges.

Thereupon Seuthes summoned Xenophon, disclosed to him the proposals they were making, and said that he should not grant them a truce if Xenophon wanted to punish them for their attack.

And Xenophon said: Why, for my part I think I have abundant satisfaction as it is, if these people are to be slaves instead of free men. He added, however, that he advised Seuthes to take as hostages in the future those who were most capable of doing harm and to leave the old men at home. Thus it was that all the people in this region surrendered.