Plato, Laws 692a

κατὰ γῆρας σώφρονα δύναμιν τῇ κατὰ γένος αὐθάδει ῥώμῃ, τὴν τῶν ὀκτὼ καὶ εἴκοσι γερόντων ἰσόψηφον εἰς τὰ μέγιστα τῇ τῶν βασιλέων ποιήσασα δυνάμει. ὁ δὲ τρίτος σωτὴρ ὑμῖν ἔτι σπαργῶσαν καὶ θυμουμένην τὴν ἀρχὴν ὁρῶν, οἷον ψάλιον ἐνέβαλεν αὐτῇ τὴν τῶν ἐφόρων δύναμιν, ἐγγὺς τῆς κληρωτῆς ἀγαγὼν δυνάμεως· καὶ κατὰ δὴ τοῦτον τὸν λόγον ἡ βασιλεία παρʼ ὑμῖν, ἐξ ὧν ἔδει σύμμεικτος γενομένη καὶ μέτρον ἔχουσα, σωθεῖσα αὐτὴ σωτηρίας τοῖς ἄλλοις γέγονεν

of the royal strain with the temperate potency of age, by making the power of the eight-and-twenty elders of equal weight with that of the kings in the greatest matters. Then your third saviour, seeing your government still fretting and fuming, curbed it, as one may say, by the power of the ephors, which was not far removed from government by lot. Thus, in your case, according to this account, owing to its being blended of the right elements and possessed of due measure, the kingship not only survived itself but ensured the survival of all else.