Pausanias Description of Greece 10.2.1

[1]
  When the Persian army crossed into Europe , it is said that the Phocians were forced to join the Great King, but deserted the Persian cause and ranged themselves with the Greeks at the battle of Plataea . Subsequently it happened that a fine was inflicted on them by the Amphictyons. I cannot find out the truth of the story, whether the fine was inflicted because of the misdeeds of the Phocians, or whether the Thessalians exacted the fine from the Phocians because of their ancient hatred.

[1] When the forces of the Persians [ Persai] crossed into Europe [ Eurōpē], it is said that the men of Phokis were forced to join the Great King but defected from the side of the Medes [ Mēdoi] and went over to the Greek side [ tò Hellēnikon] on the occasion of the great deed-of-victory [ ergon] at [the battle at] Plataea. Subsequently, it happened that a fine was imposed on them by the Amphiktyones. I cannot find out the truth [ tò alēthes] of the story [ logos], whether the fine was imposed because of some misdeeds [ adikēmata] committed the people of Phokis, or whether the Thessalians imposed the fine on the people of Phokis because of their ancient hatred [ mīsos].