Dion
Plutarch
Plutarch. Plutarch's Lives, Vol. VI. Perrin, Bernadotte, translator. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1918.
while that of the unjust was wretched, the tyrant, as if convicted by his arguments, would not listen to them, and was vexed with the audience because they admired the speaker and were charmed by his utterances.
At last he got exceedingly angry and asked the philosopher why he had come to Sicily.
And when Plato said that he was come to seek a virtuous man, the tyrant answered and said:
Well, by the gods, it appears that you have not yet found such an one.
Dion thought that this was the end of his anger, and as Plato was eager for it, sent him away upon a trireme, which was conveying Pollis the Spartan to Greece.
But Dionysius privily requested Pollis to kill Plato on the voyage, if it were in any way possible, but if not, at all events to sell him into slavery; for he would take no harm, but would be quite as happy, being a just man, even if he should become a slave.