Passage 6.13.10
ἐγένετο δὲ καὶ τοῦ Φειδώλα τοῖς παισὶν ἐπὶ κέλητι ἵππῳ νίκη, καὶ ὅ τε ἵππος ἐπὶ στήλῃ πεποιημένος καὶ ἐπίγραμμά ἐστιν ἐπʼ αὐτῷ· ὠκυδρόμας Λύκος Ἴσθμιʼ ἅπαξ, δύο δʼ ἐνθάδε νίκαις Φειδώλα παίδων ἐστεφάνωσε δόμους. οὐ μὴν τῷ γε ἐπιγράμματι καὶ τὰ Ἠλείων ἐς τοὺς Ὀλυμπιονίκας ὁμολογεῖ γράμματα· ὀγδόῃ γὰρ Ὀλυμπιάδι καὶ ἑξηκοστῇ καὶ οὐ πέρα ταύτης ἐστὶν ἐν τοῖς Ἠλείων γράμμασιν ἡ νίκη τῶν Φειδώλα παίδων·
The sons of Pheidolas also gained a victory in the riding-horse race; the horse itself is represented on a stele with an inscription upon it: "Swift-running Lykos once at the Isthmian games, and twice here by victories crowned the house of Pheidolas' children." Yet the inscription does not agree with the Eleans' records of Olympic victors, since according to the Elean writings the sons of Pheidolas obtained their victory in the sixty-eighth Olympiad and no later.