Passage 6.13.4
Πολίτης μὲν δὴ ἐπὶ τῆς δευτέρας καὶ τέσσαρας, ὡς ἂν ἕκαστοι συνταχθῶσιν ὑπὸ τοῦ κλήρου, καὶ οὐκ ἀθρόους ἀφιᾶσιν ἐς τὸν δρόμον· οἳ δʼ ἂν ἐν ἑκάστῃ τάξει κρατήσωσιν, ὑπὲρ αὐτῶν αὖθις θέουσι τῶν ἄθλων· καὶ οὕτω σταδίου δύο ὁ στεφανούμενος ἀναιρήσεται νίκας. τὰ μέντοι ἐπιφανέστατα ἐς δρόμον Λεωνίδᾳ Ῥοδίῳ ἐστίν· ἐπὶ γὰρ τέσσαρας Ὀλυμπιάδας ἀκμάζων τε τῇ ὠκύτητι ἀντήρκεσε, καὶ γεγόνασιν αὐτῷ δρόμου νῖκαι δύο ἀριθμὸν καὶ δέκα.
The citizens run according to the second and fourth groupings, to which each is assigned by lot, and they do not set off all at once in the race. Those who prove victorious in each heat run once more to contend for the prizes. Thus, the victor awarded the crown achieves twice the distance of the stadion. The most remarkable record in running, however, belongs to Leonidas of Rhodes: he maintained his peak speed through four Olympiads, and altogether gained twelve victories in running events.