Pausanias Description of Greece 1.4.4

[4] So, they tried to save the Greeks [ Hellēnes] in the way described, but the Gauls, now south of the Gates [= Thermopylae], cared not at all to capture the other towns, but were very eager to plunder Delphi and the treasures of the god. They were opposed by the people of Delphi themselves and by the men of Phokis who originated from the cities around Mount Parnassus; a force of Aetolians also joined the defenders, for the Aetolians at this time were preeminent for their vigorous resistance. When the forces engaged, not only were thunderbolts [ keraunoi] and rocks broken off from Parnassus hurled against the Gauls, but terrifying-shapes [ deimata] that looked like armed warriors appeared to the barbarians. They say that two of these apparitions, Hyperokhos and Amadokos, came from the Hyperboreans, and that the third was Pyrrhos son of Achilles. Because of this help in battle the Delphians sacrifice [ enagizein] to Pyrrhos [as to a hero], although formerly they held even his tomb [ mnēma] in dishonor [ atīmiā], as being that of an enemy. 22