Passage 6.19.14
λέγονται δὲ καὶ Ἀργεῖοι μετασχεῖν πρὸς τοὺς Κορινθίους Μεγαρεῦσι τοῦ ἔργου. τὸν δὲ ἐν Ὀλυμπίᾳ θησαυρὸν ἔτεσιν ὕστερον τῆς μάχης ἐποίησαν οἱ Μεγαρεῖς· τὰ δὲ ἀναθήματα ἐκ παλαιοῦ σφᾶς ἔχειν εἰκός, ἅ γε ὁ Λακεδαιμόνιος †Δόντας Διποίνου καὶ Σκύλλιδος μαθητὴς ἐποίησε.
It is said that the Argives also took part with the Corinthians in this deed against the Megarians. As for the treasury in Olympia, the Megarians built it some years after the battle. But the offerings contained within it are likely to have been theirs from earlier times, works made by the Lacedaemonian Dontas, a pupil of Dipoenus and Scyllis.