Passage 6.15.9
μετὰ δὲ τὸν Εὐτελίδαν Ἀρεύς τε αὖθις ὁ Λακεδαιμονίων βασιλεὺς καὶ Ἠλεῖος παρʼ αὐτὸν ἀνάκειται Γόργος. μόνῳ δὲ ἀνθρώπων ἄχρι ἐμοῦ τῷ Γόργῳ τέσσαρες μὲν ἐν Ὀλυμπίᾳ γεγόνασιν ἐπὶ πεντάθλῳ, διαύλου δὲ καὶ ὅπλου μία ἐφʼ ἑκατέρῳ νίκη.
After Eutelidas, there stands again Areus, king of the Lacedaemonians, and beside him the Eleian Gorgus. Gorgus alone, of all men up to my time, achieved four victories at Olympia in the pentathlon, as well as one victory each in the diaulos race and the race in armor.