Histories
Herodotus
Herodotus. Godley, Alfred Denis, translator. Cambridge, MA; London: Harvard University Press; William Heinemann, Ltd., 1920-1925 (printing).
The Hellenes, however, stood ordered in ranks by nation, and each of them fought in turn, except the Phocians, who were posted on the mountain to guard the path.[*](For which see below, Hdt. 7.215, 216.) When the Persians found nothing different from what they saw the day before, they withdrew.
The king was at a loss as to how to deal with the present difficulty. Epialtes son of Eurydemus, a Malian, thinking he would get a great reward from the king, came to speak with him and told him of the path leading over the mountain to +Thermopylae [22.5583,38.8] (Perseus) Thermopylae. In so doing he caused the destruction of the Hellenes remaining there.
Later he fled into +Thessaly [22.25,39.5] (region), Greece, Europe Thessaly in fear of the Lacedaemonians, and while he was in exile, a price was put on his head by the Pylagori [*](Cp. Hdt. 7.200 (note).) when the Amphictyons assembled at Pylae. Still later he returned from exile to Anticyra and was killed by Athenades, a Trachinian.