Passage 6.14.2
ὄγδοον γὰρ ἐπὶ τοῖς δέκα ἔτεσι γεγονὼς μὴ παλαῖσαι μὲν ἐν παισὶν ὑπὸ Ἠλείων ἀπηλάθη, ἀνηγορεύθη δὲ ἐν ἀνδράσιν, ὥσπερ γε καὶ ἐνίκησεν· ἀνηγορεύθη δὲ καὶ ὕστερον Νεμέᾳ τε καὶ Ἰσθμῷ. γεγονότα δὲ εἰκοσαετῆ τὸ χρεὼν ἐπιλαμβάνει, πρὶν ἢ ἐς τὴν Ῥόδον αὐτὸν οἴκαδε ἀναστρέψαι. τὸ δὲ ἐν Ὀλυμπίᾳ τοῦ Ῥοδίου παλαιστοῦ τόλμημα Ἀρτεμίδωρος γένος Τραλλιανὸς ὑπερεβάλετο κατὰ ἐμὴν δόξαν. Ἀρτεμιδώρῳ γὰρ ἁμαρτεῖν μὲν Ὀλυμπίων συνέβη παγκρατιάζοντι ἐν παισίν, αἰτία δέ οἱ ἐγένετο τῆς διαμαρτίας τὸ ἄγαν νέον·
For being eighteen years old, he was prevented by the Eleans from wrestling among the boys, yet he was accepted among the men—and indeed gained the victory. Later he was also proclaimed victorious at Nemea and the Isthmus. Having reached twenty years of age, an appointed fate overtook him before he had returned home to Rhodes. In my opinion, the bold deed of this Rhodian wrestler at Olympia was surpassed by Artemidoros, a native of Tralles. Artemidoros, competing in boys' pankration, failed to win an Olympic victory solely because he was excessively young.