Pausanias Description of Greece 10.2.4

[4]
  When they had seized the sanctuary, the best mercenaries in Greece at once mustered to join them, while the Thebans, at variance before, declared open war against them. The war lasted ten successive years, and during this long time victory often fell to the Phocians and their mercenaries, and often the Thebans proved the better. An engagement took place at the town of Neon, in which the Phocians were worsted, and in the rout Philomelus threw himself down a high precipice, and so lost his life. This was the very punishment fixed by the Amphictyons for spoilers of the sanctuary.

[4] When they [= the men of Phokis] had seized the sanctuary [ hieron], the best mercenaries [ xenika] in Greece right away gathered to join them, while the Thebans, who were already feeling hostile, declared open war against them. The war lasted ten successive years, and during this long time, victory [ nīkân] often went to the men of Phokis and their mercenaries, but often the Thebans came-out-on-top [ krateîn]. But then, in a battle thattook place at the city of Neōn, the men of Phokis were routed, and, as he was fleeing, Philomēlos threw himself down a high precipice, and so lost his life [ psūkhē]. This was exactly the form of punishment [ dikē] set by the Amphiktyones for those who plundered [the sanctuary of Delphi].