Passage 5.27.2
τὰ δὲ ἐς Ὀλυμπίαν δύο τέ εἰσιν ἵπποι καὶ ἡνίοχοι δύο, ἑκατέρῳ τῶν ἵππων παρεστὼς ἀνὴρ ἡνίοχος· ὁ μὲν δὴ πρότερος τῶν ἵππων καὶ ὁ ἀνὴρ Διονυσίου τοῦ Ἀργείου, τὰ δεύτερα δὲ ἔργα ἐστὶν Αἰγινήτου Σίμωνος . τῷ προτέρῳ δὲ τῶν ἵππων ἐπίγραμμα ἔπεστιν ἐπὶ τῇ πλευρᾷ, τὰ πρῶτα οὐ σὺν μέτρῳ· λέγει γὰρ δὴ οὕτω· Φόρμις ἀνέθηκεν Ἀρκὰς Μαινάλιος, νῦν δὲ Συρακόσιος.
The dedications at Olympia consist of two horses with two charioteers; next to each horse stands a charioteer. The first pair of horse and man were made by Dionysius of Argos, while the second are works by Simon the Aeginetan. On the flank of the first horse there is an inscription; the opening words are not in metrical form, but read thus: "Dedicated by Phormis, an Arcadian from Maenalus, but now of Syracuse."