The Histories · 8.31

When these words were reported, then the Thessalians, moved with anger against the Phokians, became guides to the Barbarian to show him the way: and from the land of Trachis they entered Doris; for a narrow strip of the Dorian territory extends this way, about thirty furlongs in breadth, lying between Malis and Phokis, the region which was in ancient time called Dryopis; this land is the mother-country of the Dorians in Peloponnese. Now the Barbarians did not lay waste this land of Doris when they entered it, for the people of it were taking the side of the Medes, and also the Thessalians did not desire it.

Herodotus of Halicarnassus · trans. G. C. Macaulay, 1890
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