The Iliad 24.171–187

The Olympian biddeth thee ransom goodly Hector, and bear gifts to Achilles which shall make glad his heart; alone do thou go, neither let any man beside of the Trojans go with thee. A herald may attend thee, an elder man, to guide the mules and the light-running waggon, and to carry back to the city the dead, even him that Achilles slew. Let not death be in thy thoughts, neither any fear; such a guide shall go with thee, even Argeiphontes, who shall lead thee, until in his heading he bring thee nigh to Achilles. And when he shall have led thee into the hut, neither shall Achilles himself slay thee nor suffer any other to slay; for not without wisdom is he, neither without purpose, nor yet hardened in sin; nay, with all kindliness will he spare a suppliant man.