Plato, Letters 345c

πῶς ἄν, μὴ θαυμαστὸς ὢν ἄνθρωπος, τὸν ἡγεμόνα τούτων καὶ κύριον οὕτως εὐχερῶς ἠτίμασέν ποτʼ ἄν; πῶς δʼ ἠτίμασεν, ἐγὼ φράζοιμʼ ἄν.οὐ πολὺν χρόνον διαλιπὼν τὸ μετὰ τοῦτο, ἐν τῷ πρόσθεν Δίωνα ἐῶν τὰ ἑαυτοῦ κεκτῆσθαι καὶ καρποῦσθαι χρήματα, τότε οὐκέτʼ εἴα τοὺς ἐπιτρόπους αὐτοῦ πέμπειν εἰς Πελοπόννησον, καθάπερ ἐπιλελησμένος τῆς ἐπιστολῆς παντάπασιν· εἶναι γὰρ αὐτὰ οὐ Δίωνος ἀλλὰ τοῦ ὑέος, ὄντος μὲν ἀδελφιδοῦ

for the liberal education of the soul, how could he possibly (unless he is a most extraordinary person) have treated the leading authority on this subject with such ready disrespect? And how he showed this disrespect I will now relate. It happened next, after no long interval, that whereas Dionysius had previously allowed Dion to remain in possession of his own property and to enjoy the income, he now ceased to permit Dion’s trustees to remit it to the Peloponnese, just as though he had entirely forgotten the terms of his letter, claiming that the property belonged not to Dion but to his son,