Passage 5.13.5
ἔτεσι δὲ ὕστερον πολλοῖς μετὰ ἅλωσιν Ἰλίου Δαμάρμενον ἁλιέα ἐξ Ἐρετρίας ἀφέντα δίκτυον ἐς θάλασσαν τὸ ὀστοῦν ἑλκύσαι, θαυμάσαντα δὲ αὐτοῦ τὸ μέγεθος ἔχειν ἀποκρύψαντα ὑπὸ τὴν ψάμμον. τέλος δὲ αὐτὸν ἀφικέσθαι καὶ ἐς Δελφούς, ὅτου τε ἀνδρὸς τὸ ὀστοῦν εἴη καὶ ὅ τι χρηστέον αὐτῷ διδαχθῆναι δεησόμενον.
Many years later, after the capture of Troy, Damarmenus, a fisherman from Eretria, cast a net into the sea and drew up the bone. Astonished by its great size, he concealed it beneath the sand. In the end, he journeyed also to Delphi, wishing to learn from the oracle whose bone it was and what he ought to do with it.