Plato, Laws 818c

παράπαν οὐκ ἄν ποτε γένοιτο ἀνθρώποις θεὸς οὐδὲ δαίμων οὐδὲ ἥρως οἷος δυνατὸς ἀνθρώπων ἐπιμέλειαν σὺν σπουδῇ ποιεῖσθαι· πολλοῦ δʼ ἂν δεήσειεν ἄνθρωπός γε θεῖος γενέσθαι μήτε ἓν μήτε δύο μήτε τρία μήθʼ ὅλως ἄρτια καὶ περιττὰ δυνάμενος γιγνώσκειν, μηδὲ ἀριθμεῖν τὸ παράπαν εἰδώς, μηδὲ νύκτα καὶ ἡμέραν διαριθμεῖσθαι δυνατὸς ὤν, σελήνης δὲ καὶ ἡλίου καὶ τῶν ἄλλων ἄστρων περιφορᾶς

learned by every god, daemon, and hero, if he is to be competent seriously to supervise mankind: a man certainly would be far from becoming godlike if he were incapable of learning the nature of one and of two, and of even and odd numbers in general, and if he knew nothing at all about counting, and could not count even day and night as distinct objects, and if he were ignorant of the circuit of the sun and moon and all the other stars.