The Prophecy of Sparta: Herodotus 7.219-20

"Hear your fate, O dwellers in Sparta of the wide spaces; either your famed, great town must be sacked by Perseus' sons, or, if that be not, the whole land of Lacedaemon shall mourn the death of a king of the house of Heracles, for not the strength of lions or bulls shall hold him, strength against strength, for he has the power of Zeus, and will not be checked  till one of these two has consumed"