Plato, Laws 692d

αἰσχρῶς γοῦν ἠμύναντο αὐτούς, ὦ Κλεινία. τὸ δʼ αἰσχρὸν λέγω οὐχ ὡς οὐ νικῶντές γε οἱ τότε καὶ κατὰ γῆν καὶ κατὰ θάλατταν καλὰς νενικήκασι μάχας· ἀλλὰ ὅ φημι αἰσχρὸν τότʼ εἶναι, τόδε λέγω, τὸ πρῶτον μὲν ἐκείνων τῶν πόλεων τριῶν οὐσῶν μίαν ὑπὲρ τῆς Ἑλλάδος ἀμῦναι, τὼ δὲ δύο κακῶς οὕτως εἶναι διεφθαρμένα, ὥστε ἡ μὲν καὶ Λακεδαίμονα διεκώλυεν ἐπαμύνειν αὐτῇ, πολεμοῦσα αὐτῇ κατὰ κράτος, ἡ δʼ αὖ πρωτεύουσα ἐν τοῖς τότε χρόνοις τοῖς

The way they repulsed the Persians, Clinias, was disgraceful. But when I say disgraceful, I do not imply that they did not win fine victories both by land and sea in those victorious campaigns: what I call disgraceful is this,—that, in the first place, one only of those three States defended Greece, while the other two were so basely corrupt that one of them actually prevented Lacedaemon from assisting Greece by warring against her with all its might, and Argos, the other,—which stood first of the three in the days of the Dorian settlement—