The Iliad 21.284–287

drew nigh and stood by his side, being likened in form to mortal men, and they clasped his hand in theirs and pledged him in words. And among them Poseidon, the Shaker of Earth, was first to speak: Son of Peleus, tremble not thou overmuch, neither be anywise afraid, such helpers twain are we from the gods—and Zeus approveth thereof —even I and Pallas Athene. Therefore is it not thy doom to be vanquished by a river; nay, he shall soon give respite, and thou of thyself shalt know it. But we will give thee wise counsel, if so be thou wilt hearken. Make not thine hands to cease from evil battleuntil within the famed walls of Ilios thou hast pent the Trojan host, whosoever escapeth. But for thyself, when thou hast bereft Hector of life, come thou back to the ships; lo, we grant thee to win glory.