In the beginning Dardanus was the son of Jove, and founded Dardania, for Ilius was not yet stablished on the plain for men to dwell in, and her people still abode on the spurs of many-fountained Ida. Dardanus had a son, king Erichthonius, who was wealthiest of all men living; he had three thousand mares that fed by the water-meadows, they and their foals with them. Boreas was enamoured of them as they were feeding, and covered them in the semblance of a dark-maned stallion. Twelve filly foals did they conceive and bear him, and these, as they sped over the rich plain, would go bounding on over the ripe ears of corn and not break them; or again when they would disport themselves on the broad back of Ocean they could gallop on the crest of a breaker. Erichthonius begat Tros, king of the Trojans, and Tros had three noble sons, Ilus, Assaracus, and Ganymede who was comeliest of mortal men; wherefore the gods carried him off to be Jove’s cupbearer, for his beauty’s sake, that he might dwell among the immortals.
From Book XX of The Iliad (translation by Samuel Butler).