Passage 6.21.8
ἔστι δὲ καὶ ἄλλος Ἁρπινάτης καλούμενος ποταμὸς καὶ οὐ πολὺ ἀπὸ τοῦ ποταμοῦ πόλεως Ἁρπίνης ἄλλα τε ἐρείπια καὶ μάλιστα οἱ βωμοί· οἰκίσαι δὲ Οἰνόμαον τὴν πόλιν καὶ θέσθαι τὸ ὄνομα ἀπὸ τῆς μητρὸς λέγουσιν Ἁρπίνης.
There is also another river called Harpinates, and not far from this river are ruins of the city of Harpina; especially notable among them are the altars. It is said that Oinomaos founded this city, naming it Harpina after his mother.