Plato, Laws 683d

τούτων ὑποχείρια τοῖς προγόνοις ὑμῶν, ὦ Μέγιλλε, ἱκανῶς ἐγεγόνει· τὸ δὲ δὴ μετὰ τοῦτο ἔδοξεν αὐτοῖς, ὥς γε λέγεται τὸ τοῦ μύθου, τριχῇ τὸ στράτευμα διανείμαντας, τρεῖς πόλεις κατοικίζειν, Ἄργος, Μεσσήνην, Λακεδαίμονα. πάνυ μὲν οὖν. καὶ βασιλεὺς μὲν Ἄργους Τήμενος ἐγίγνετο, Μεσσήνης δὲ Κρεσφόντης, Λακεδαίμονος δὲ Προκλῆς καὶ Εὐρυσθένης. πῶς γὰρ οὔ; καὶ πάντες δὴ τούτοις ὤμοσαν οἱ τότε βοηθήσειν,

Megillus, to your forefathers. They determined next, according to the tradition, to divide their host into three parts, and to establish three States,—Argos, Messene and Lacedaemon. Very true. And Temenus became King of Argos, Cresphontes of Messene, and Proclus and Eurysthenes of Lacedaemon. Of course. And all the men of that time swore that they would assist these kings