Plato, Letters 335c

νοστήσαντι πορείαν ἄτιμόν τε καὶ ἀθλίαν πάντως πανταχῇ. Δίωνα δὴ ἐγὼ λέγων ταῦτά τε καὶ ἄλλα τοιαῦτα ἔπειθον, καὶ τοῖς ἀποκτείνασιν ἐκεῖνον δικαιότατʼ ἂν ὀργιζοίμην ἐγὼ τρόπον τινὰ ὁμοιότατα καὶ Διονυσίῳ· ἀμφότεροι γὰρ ἐμὲ καὶ τοὺς ἄλλους ὡς ἔπος εἰπεῖν ἅπαντας τὰ μέγιστα ἔβλαψαν ἀνθρώπους, οἱ μὲν τὸν βουλόμενον δικαιοσύνῃ χρῆσθαι διαφθείραντες, ὁ δὲ οὐδὲν ἐθελήσας χρήσασθαι δικαιοσύνῃ

and when he has gone beneath the earth again on a journey that is unhonored and in all ways utterly miserable. Of these and other like doctrines I tried to persuade Dion, and I have the best of rights to be angry with the men who slew him, very much as I have to be angry also with Dionysius; for both they and he have done the greatest of injuries both to me, and, one may say, to all the rest of mankind—they by destroying the man who purposed to practice justice, and he by utterly refusing to practice justice, when he had supreme power,