Passage 5.21.5
Εὐπώλου δὲ ὕστερόν φασιν Ἀθηναῖον Κάλλιππον ἀθλήσαντα πένταθλον ἐξωνήσασθαι τοὺς ἀνταγωνιουμένους χρήμασι, δευτέραν δὲ ἐπὶ ταῖς δέκα τε καὶ ἑκατὸν Ὀλυμπιάδα εἶναι ταύτην. ἐπιβληθείσης δὲ τῷ Καλλίππῳ καὶ τοῖς ἀνταγωνισαμένοις ζημίας ὑπὸ Ἠλείων, ἀποστέλλουσιν Ὑπερείδην Ἀθηναῖοι πείσοντα Ἠλείους ἀφεῖναί σφισι τὴν ζημίαν· ἀπειπόντων δὲ Ἠλείων τὴν χάριν, ἐχρῶντο ὑπεροψίᾳ τοιᾷδε ἐς αὐτοὺς οἱ Ἀθηναῖοι, οὔτε ἀποδιδόντες τὰ χρήματα καὶ Ὀλυμπίων εἰργόμενοι, πρὶν ἤ σφισιν ὁ θεὸς ὁ ἐν Δελφοῖς οὐ πρότερον ἔφησεν ὑπὲρ οὐδενὸς χρήσειν πρὶν ἢ τὴν ζημίαν ἀποδοῖεν Ἠλείοις.
After Eupolus, it is said that an Athenian named Callippus, competing in the pentathlon, bribed his rivals with money; this was in the hundred and twelfth Olympiad. When Callippus and those who had competed against him were fined by the Eleans, the Athenians sent Hyperides to persuade the Eleans to remit the penalty. However, when the Eleans refused this favor, the Athenians treated them with such disdain that they neither paid the fine nor participated in the Olympic Games, until the god at Delphi declared that he would respond to none of their inquiries until they had paid the penalty to the Eleans.