Passage 8.14.5
καὶ Ποσειδῶν χαλκοῦς ἕστηκεν ἐπωνυμίαν Ἵππιος, ἀναθεῖναι δὲ τὸ ἄγαλμα τοῦ Ποσειδῶνος Ὀδυσσέα ἔφασαν· ἀπολέσθαι γὰρ ἵππους τῷ Ὀδυσσεῖ, καὶ αὐτὸν γῆν τὴν Ἑλλάδα κατὰ ζήτησιν ἐπιόντα τῶν ἵππων ἱδρύσασθαι μὲν ἱερὸν ἐνταῦθα Ἀρτέμιδος καὶ Εὑρίππαν ὀνομάσαι τὴν θεόν, ἔνθα τῆς Φενεατικῆς χώρας εὗρε τὰς ἵππους, ἀναθεῖναι δὲ καὶ τοῦ Ποσειδῶνος τὸ ἄγαλμα τοῦ Ἱππίου.
There is also a bronze statue of Poseidon, surnamed Hippios ("Horse God"). They say that Odysseus dedicated this image of Poseidon. For it happened that Odysseus lost his horses, and as he proceeded throughout Greece in search of them, he founded there a sanctuary to Artemis, naming the goddess Eurippa ("Finder of Horses"), because it was in that part of Pheneatian territory he found them. He also set up the statue of Poseidon Hippios.