Passage 7.18.2
τοῦ δὲ Πείρου ποταμοῦ περὶ τοὺς ὀγδοήκοντα ἀφέστηκε σταδίους Πατρέων ἡ πόλις· οὐ πόρρω δὲ αὐτῆς ποταμὸς Γλαῦκος ἐκδίδωσιν ἐς θάλασσαν. Πατρέων δὲ οἱ τὰ ἀρχαιότατα μνημονεύοντές φασιν Εὔμηλον αὐτόχθονα οἰκῆσαι πρῶτον ἐν τῇ χώρᾳ, βασιλεύοντα αὐτὸν ἀνθρώπων οὐ πολλῶν. Τριπτολέμου δὲ ἐκ τῆς Ἀττικῆς ἀφικομένου τόν τε καρπὸν λαμβάνει τὸν ἥμερον καὶ οἰκίσαι διδαχθεὶς πόλιν Ἀρόην ὠνόμασεν ἐπὶ τῇ ἐργασίᾳ τῆς γῆς.
The city of Patrae stands about eighty stades from the river Peirus, and not far from it the river Glaucus empties into the sea. The people of Patrae, who recount the earliest traditions, say that an autochthonous inhabitant named Eumelus was the first to dwell in the land, ruling over a small number of people. Later, when Triptolemus arrived from Attica, Eumelus received cultivated grain from him, and, instructed by him in city-building, founded a town which he named Aroe, commemorating the tilling of the earth.