XANTHOS & PODARKES were two immortal horses which the Athenian King Erekhtheus received from Boreas, god of the north wind, as the bride-price for his daughter Oreithyia.
Nonnus, Dionysiaca 37. 155 ff (trans. Rouse) (Greek epic C5th A.D.) :
"First Erekhtheus [king of Athens] brought his horse Xanthos (Bayard) under the yoke, and fastened in his mare Podarkes (Swiftfoot); both sired by North-wind Boreas in winged coupling when he dragged a Sithonian Harpyia Aellopos to himself, and Wind gave them as loveprice to his godfather Erekhtheus when he stole Attic Oreithyia for his bride."
- Nonnos, Dionysiaca - Greek Epic C5th AD