Plato, Meno 94c

τὸ πρᾶγμα, ἐνθυμήθητι ὅτι Θουκυδίδης αὖ δύο ὑεῖς ἔθρεψεν, Μελησίαν καὶ Στέφανον, καὶ τούτους ἐπαίδευσεν τά τε ἄλλα εὖ καὶ ἐπάλαισαν κάλλιστα Ἀθηναίων—τὸν μὲν γὰρ Ξανθίᾳ ἔδωκε, τὸν δὲ Εὐδώρῳ· οὗτοι δέ που ἐδόκουν τῶν τότε κάλλιστα παλαίειν—ἢ οὐ μέμνησαι; ἔγωγε, ἀκοῇ. οὐκοῦν δῆλον ὅτι οὗτος οὐκ ἄν ποτε, οὗ μὲν ἔδει

let me remind you that Thucydides’ also brought up two sons, Melesias and Stephanus, and that besides giving them a good general education he made them the best wrestlers in Athens: one he placed with Xanthias, and the other with Eudorus—masters who, I should think, had the name of being the best exponents of the art. You remember them, do you not? Yes, by hearsay. Well, is it not obvious that this father would never have spent his money on having his children taught all those things,