Passage 6.18.1
ἔστι δὲ καὶ τοῦ Κυρηναίου Κρατισθένους χαλκοῦν ἅρμα, καὶ Νίκη τε ἐπιβέβηκε τοῦ ἅρματος καὶ αὐτὸς ὁ Κρατισθένης. δῆλα μὲν δὴ ὅτι ἵππων γέγονεν αὐτῷ νίκη· λέγεται δὲ καὶ ὡς Μνασέου τοῦ δρομέως, ἐπικληθέντος δὲ ὑπὸ Ἑλλήνων Λίβυος, εἴη παῖς ὁ Κρατισθένης. τὰ δὲ ἀναθήματα αὐτῷ τὰ ἐς Ὀλυμπίαν ἐστὶ τοῦ Ῥηγίνου Πυθαγόρου τέχνη.
There is also a bronze chariot of Cratisthenes the Cyrenaean; figures of Victory and Cratisthenes himself are standing upon the chariot. Clearly, his victory was won in a horse-race. It is said, moreover, that this Cratisthenes was the son of Mnaseas, the runner, whom the Greeks called "the Libyan." The votive offerings dedicated by Cratisthenes at Olympia are the work of Pythagoras of Rhegium.