Passage 5.4.6
τῷ δὲ Ἰφίτῳ, φθειρομένης τότε δὴ μάλιστα τῆς Ἑλλάδος ὑπὸ ἐμφυλίων στάσεων καὶ ὑπὸ νόσου λοιμώδους, ἐπῆλθεν αἰτῆσαι τὸν ἐν Δελφοῖς θεὸν λύσιν τῶν κακῶν· καί οἱ προσταχθῆναί φασιν ὑπὸ τῆς Πυθίας ὡς αὐτόν τε Ἴφιτον δέοι καὶ Ἠλείους τὸν Ὀλυμπικὸν ἀγῶνα ἀνανεώσασθαι. ἔπεισε δὲ Ἠλείους Ἴφιτος καὶ Ἡρακλεῖ θύειν, τὸ πρὸ τούτου πολέμιόν σφισιν Ἡρακλέα εἶναι νομίζοντας. τὸν δὲ Ἴφιτον τὸ ἐπίγραμμα τὸ ἐν Ὀλυμπίᾳ φησὶν Αἴμονος παῖδα εἶναι, Ἑλλήνων δὲ οἱ πολλοὶ Πραξωνίδου καὶ οὐχ Αἴμονος εἶναί φασι· τὰ δὲ Ἠλείων γράμματα ἀρχαῖα ἐς πατέρα ὁμώνυμον ἀνῆγε τὸν Ἴφιτον.
When Greece was then particularly ravaged by civil strife and an epidemic disease, Iphitos resolved to ask the god at Delphi for relief from these evils. The Pythian priestess commanded Iphitos himself, together with the Eleans, to renew the Olympic festival. Iphitos convinced the Eleans to sacrifice to Herakles, though previously they had regarded Herakles as their enemy. There is an inscription at Olympia which states that Iphitos was a son of Haimon, but most Greeks say that he was the son of Praxonides and not Haimon. However, ancient Elean writings trace Iphitos back to a father of the same name.