The Iliad 21.200–213

He spake, and drew forth from the bank his spear of bronze, and left Asteropaeus where he was, when he had robbed him of his life, lying in the sands; and the dark water wetted him. With him then the eels and fishes dealt, plucking and tearing the fat about his kidneys; but Achilles went his way after the Paeonians, lords of chariots, who were still huddled in rout along the eddying river, when they saw their best man mightily vanquished in the fierce conflict beneath the hands and sword of the son of Peleus. There slew he Thersilochus and Mydon and Astypylus and Mnesus and Thrasius and Aenius and Ophelestes; and yet more of the Paeonians would swift Achilles have slain, had not the deep-eddying River waxed wroth and called to him in the semblance of a man, sending forth a voice from out the deep eddy: O Achilles, beyond men art thou in might, and beyond men doest deeds of evil;for ever do the very gods give thee aid. If so be the son of Cronos hath granted thee to slay all the men of Troy, forth out of my stream at least do thou drive them, and work thy direful work on the plain. Lo, full are my lovely streams with dead men, nor can I anywise avail to pour my waters forth into the bright sea,being choked with dead, while thou ever slayest ruthlessly. Nay, come, let be; amazement holds me, thou leader of hosts. Then swift-footed Achilles answered him, saying: Thus shall it be, Scamander, nurtured of Zeus, even as thou biddest. Howbeit the proud Trojan will I not cease to slayuntil I have pent them in their city, and have made trial of Hector, man to man, whether he shall slay me or I him. So saying he leapt upon the Trojans like a god. Then unto Apollo spake the deep-eddying River: Out upon it, thou lord of the silver bow, child of Zeus, thou verily hast not kept the commandmentof the son of Cronos, who straitly charged thee to stand by the side of the Trojans and to succour them, until the late-setting star of even shall have come forth and darkened the deep-soiled earth.