Passage 5.14.9
ἐφεξῆς δὲ Ὁμονοίας βωμὸς καὶ αὖθις Ἀθηνᾶς, ὁ δὲ Μητρὸς θεῶν. τῆς ἐσόδου δὲ τῆς ἐς τὸ στάδιόν εἰσιν ἐγγύτατα βωμοὶ δύο· τὸν μὲν αὐτῶν Ἑρμοῦ καλοῦσιν Ἐναγωνίου, τὸν δὲ ἕτερον Καιροῦ. Ἴωνι δὲ οἶδα τῷ Χίῳ καὶ ὕμνον πεποιημένον Καιροῦ· γενεαλογεῖ δὲ ἐν τῷ ὕμνῳ νεώτατον παίδων Διὸς Καιρὸν εἶναι. πλησίον δὲ τοῦ Σικυωνίων θησαυροῦ ἤτοι Κουρήτων ἢ τοῦ Ἀλκμήνης ἐστὶν Ἡρακλέους· λέγεται γὰρ καὶ ἀμφότερα.
Next is an altar of Concord, then again one of Athena, and another of the Mother of the Gods. Closest to the entrance to the stadium are two altars; one of these they name Hermes Enagonios ("of the Contest"), and the other Kairos ("Opportunity"). I know that Ion the Chian composed a hymn to Kairos, and in that hymn he makes Kairos the youngest son of Zeus. Near the treasury of the Sicyonians there is the treasury either of the Curetes or of Alcmene, mother of Heracles; for both accounts are told.