Plato, Laws 707c

λέγουσι ταῦτα. ἡμεῖς δέ, ὦ φίλε, ἐγώ τε καὶ ὅδε, Μέγιλλος, φαμὲν τὴν πεζὴν μάχην τὴν ἐν Μαραθῶνι γενομένην καὶ ἐν Πλαταιαῖς, τὴν μὲν ἄρξαι τῆς σωτηρίας τοῖς Ἕλλησι, τὴν δὲ τέλος ἐπιθεῖναι, καὶ τὰς μὲν βελτίους τοὺς Ἕλληνας ποιῆσαι, τὰς δὲ οὐ βελτίους, ἵνʼ οὕτως λέγωμεν περὶ τῶν τότε συσσωσασῶν ἡμᾶς μαχῶν· πρὸς γὰρ τῇ περὶ Σαλαμῖνα τὴν περὶ τὸ Ἀρτεμίσιόν σοι προσθήσω κατὰ θάλατταν μάχην.

But we—that is, I myself and our friend Megillus—affirm that it was the land-battle of Marathon which began the salvation of Greece, and that of Plataea which completed it; and we affirm also that, whereas these battles made the Greeks better, the sea-fights made them worse,—if one may use such an expression about battles that helped at that time to save us (for I will let you count Artemisium also as a sea-fight, as well as Salamis). Since, however,