Plato, Epinomis 987c

ἱκανῶς ἴσμεν, ἀνάγκη λέγειν καὶ λέγομεν· ἡ γὰρ ὄντως οὖσα σοφία ταύτῃ πῃ φαίνεται τῷ καὶ σμικρὰ συννοίας ὀρθῆς θείας τε μετειληφότι. λοιποὶ δὴ τρεῖς ἀστέρες, ὧν εἷς μὲν βραδυτῆτι διαφέρων αὐτῶν ἐστι, Κρόνου δʼ αὐτόν τινες ἐπωνυμίαν φθέγγονται· τὸν δὲ μετὰ τοῦτον βραδυτῆτι λέγειν χρὴ Διός, Ἄρεως δὲ ὁ μετὰ τοῦτον, πάντων δὲ οὗτος ἐρυθρώτατον ἔχει χρῶμα. χαλεπὸν δὲ οὐδὲν τούτων κατανοῆσαί

and do state, so much as adequate knowledge tells us. For real wisdom shows herself in some such way as this to him who has got even a little share of right and divine meditation. And now there remain three stars, of which one is distinguished from the others by its slowness, and some speak of it under the title of Saturn; the next after it in slowness is to be cited as Jupiter; and the next after this, as Mars, which has the ruddiest hue of all. Nothing in all this is hard to understand