Passage 10.38.1
ἡ δὲ γῆ ἡ Λοκρῶν τῶν καλουμένων Ὀζολῶν προσεχὴς τῇ Φωκίδι ἐστὶ κατὰ τὴν Κίρραν. ἐς δὲ τὴν ἐπίκλησιν τῶν Λοκρῶν τούτων διάφορα ἤκουσα, ὁμοίως δὲ ἅπαντα δηλώσω. Ὀρεσθεῖ τῷ Δευκαλίωνος βασιλεύοντι ἐν τῇ χώρᾳ κύων ἔτεκεν ἀντὶ σκύλακος ξύλον· κατορύξαντος δὲ τοῦ Ὀρεσθέως τὸ ξύλον ἅμα τῷ ἦρι φῦναι ἄμπελον ἀπʼ αὐτοῦ λέγουσι καὶ ἀπὸ τοῦ ξύλου τῶν ὄζων γενέσθαι τὸ ὄνομα τοῖς ἀνθρώποις.
The land of the Locrians, called Ozolian, lies adjacent to Phocis near Cirrha. Concerning the epithet given to these Locrians, I have heard various explanations, all of which I shall equally relate. They say that in the reign of Orestheus, son of Deucalion, a dog gave birth not to a puppy but to a log of wood. Orestheus buried this log, and in the spring a vine grew forth from it. From this wood (ξύλον) and its branches (ὄζοι), it is said, the people derived their name, Ozolian.