The two men you have heard of, Tydeus's son and Odysseus, hunt for Philoktetes. They are bound by oath to bring him back by persuasion or naked violence. And all the Greeks heard Odysseus swear to this, since he loudly boasted of sure success.
NEOPTOLEMOS
What can they hope to win, those men, to turn their thoughts after so many years to Philoktetes, whom they made an outcast? Do they miss him now? Or have the gods brought vengeance upon them, since they punish crime?
TRADER
I will tell you. You may not know this story. There was a seer from a noble family, one of Priam's sons, in fact, called Helenos. He was captured one night on a reconnaissance by Odysseus himself, who bears all our curses as a badge of dishonor. Odysseus tricked him, and paraded him before the whole Greek army. Helenos then poured out a flood of prophesy, especially about Troy, and how the Greeks would never take it until they were able to persuade Philoktetes to come to their aid, after he had been rescued from this place. The minute Odysseus heard him say this, he promised to fetch this man, either by persuasion or by force. If he failed, he said, they could punish him. Boy, now you know why I've urged you and those whom you care for to leave.
PHILOKTETES
Ah! He swore he would persuade me to sail off with him, the bastard? He'd sooner persuade me to come back from the grave, when I am dead, to rise up, as his father did.
TRADER
I don't know that story. I must leave you now.
May the gods help you all.