Passage 5.24.6
ἔστι δὲ καὶ ἄλλος Ζεὺς οὐκ ἔχων πω γένεια, κεῖται δὲ ἐν τοῖς ἀναθήμασι τοῖς Μικύθου. τὰ δὲ ἐς Μίκυθον, γένος τε ὁποῖον ἦν αὐτῷ καὶ ἀνθʼ ὅτου τὰ ἀναθήματα ἐς Ὀλυμπίαν τὰ πολλὰ ἀνέθηκεν, ὁ ἐφεξῆς μοι λόγος δηλώσει. ἀπὸ δὲ τοῦ ἀγάλματος τοῦ εἰρημένου προελθόντι ὀλίγον κατʼ εὐθεῖαν ἄγαλμά ἐστι Διὸς οὐκ ἔχον γένεια οὐδὲ αὐτό, Ἐλαϊτῶν δὲ ἀνάθημα, οἳ καταβάντι ἐκ Καΐκου πεδίου ἐς θάλασσαν πρῶτοι ἐν τῇ Αἰολίδι οἰκοῦσι.
There is also another Zeus without a beard, situated among the offerings dedicated by Mikythos. Concerning Mikythos, his lineage, and the reason for most of his dedications at Olympia, these matters will be explained in my following narrative. A short distance onward in a direct line from the statue just mentioned stands another statue of Zeus, likewise without a beard; this is an offering of the Eleans, who dwell in Aeolis, the first people encountered when going down from the plain of the Kaikos River to the sea.