Plato, Laws 712d

ἴσως. καὶ μὴν συννοῶν γε, ὦ ξένε, τὴν ἐν Λακεδαίμονι πολιτείαν οὐκ ἔχω σοι φράζειν οὕτως ἥντινα προσαγορεύειν αὐτὴν δεῖ. καὶ γὰρ τυραννίδι δοκεῖ μοι προσεοικέναι—τὸ γὰρ τῶν ἐφόρων θαυμαστὸν ὡς τυραννικὸν ἐν αὐτῇ γέγονε —καί τις ἐνίοτέ μοι φαίνεται πασῶν τῶν πόλεων δημοκρατουμένη μάλιστʼ ἐοικέναι. τὸ δʼ αὖ μὴ φάναι ἀριστοκρατίαν

No doubt. In truth, Stranger, when I reflect on the Lacedaemonian polity, I am at a loss to tell you by what name one should describe it. It seems to me to resemble a tyranny, since the board of ephors it contains is a marvellously tyrannical feature; yet sometimes it strikes me as, of all States, the nearest to a democracy. Still, it would be totally absurd to deny that it is an aristocracy;