Plato, Republic, book 9 166:

καὶ μάλα, ἦν δ’ ἐγώ. ἀλλὰ περὶ τοῦ ἀνδρὸσ αὖ τοῦ τυραννικοῦ τί λέγεισ εἰσ ταὐτὰ ταῦτα ἀποβλέπων;