The Iliad 9.693–696

Long time were they silent in their grief, the sons of the Achaeans, but at length there spake among them Diomedes, good at the war-cry: Most glorious son of Atreus, Agamemnon, king of men, would thou hadst never besought the peerless son of Peleus, nor offered countless gifs; haughty is he even of himself,and now hast thou yet far more set him amid haughtinesses. But verily we will let him be; he may depart or he may tarry; hereafter will he fight when the heart in his breast shall bid him, and a god arouse him. But come, even as I shall bid, let us all obey.For this present go ye to your rest, when ye have satisfied your hearts with meat and wine, for therein is courage and strength; but so soon as fair, rosy-fingered Dawn appeareth, forthwith do thou array before the ships thy folk and thy chariots, and urge them on; and fight thou thyself amid the foremost.