Passage 6.7.4
Δωριεῖ δὲ τῷ Διαγόρου παρὲξ ἢ Ὀλυμπίασιν Ἰσθμίων μὲν γεγόνασιν ὀκτὼ νῖκαι, Νεμείων δὲ ἀποδέουσαι μιᾶς ἐς τὰς ὀκτώ· λέγεται δὲ καὶ ὡς Πύθια ἀνέλοιτο ἀκονιτί. ἀνηγορεύοντο δὲ οὗτός τε καὶ ὁ Πεισίροδος Θούριοι, διωχθέντες ὑπὸ τῶν ἀντιστασιωτῶν ἐκ τῆς Ῥόδου καὶ ἐς Ἰταλίαν παρὰ Θουρίους ἀπελθόντες. χρόνῳ δὲ ὕστερον κατῆλθεν ὁ Δωριεὺς ἐς Ῥόδον· καὶ φανερώτατα δὴ ἁπάντων ἀνὴρ εἷς φρονήσας οὗτος τὰ Λακεδαιμονίων φαίνεται, ὥστε καὶ ἐναυμάχησεν ἐναντία Ἀθηναίων ναυσὶν οἰκείαις, ἐς ὃ τριήρων ἁλοὺς Ἀττικῶν ἀνήχθη ζῶν παρὰ Ἀθηναίους.
Dorieus, the son of Diagoras, besides his Olympian victory, won eight victories at the Isthmian games, and at the Nemean games he had seven victories, one short of eight. It is also said that he gained a victory in the Pythian games without competition. He and Peisirodus, both of Thurii, were announced as such because they had been driven from Rhodes by their political opponents and had gone to Thurii in Italy. Later, after some time had passed, Dorieus returned to Rhodes, and of all men he appears most clearly to have shown great loyalty toward the Spartans, so much so that he even fought at sea with his own ships against the Athenians, until, captured by Attic triremes, he was brought alive to Athens.