The Iliad 24.302–307

Then, when he had washed his hands, he took the cup from his wife and then made prayer, standing in the midst of thie court, and poured forth the wine, with a look toward heaven, and spake ahoud, saying: Father Zeus, that rulest from Ida, most glorious, most great, grant that I may come unto Achilles' hut as one to be welcomed and to be pitied;and send a bird of omen, even the swift messenger that to thyself is dearest of birds and is mightiest in strength; let him appear upon my right hand, to the end that, marking the sign with mine own eyes, I may have trust therein, and go my way to the ships of the Danaans of fleet steeds. So spake he in prayer, and Zeus the Counsellor heard him.