Plato, Letters 350b

τριακόντορόν τε καὶ Λαμίσκον αὑτῶν ἕνα, ὃς ἐλθὼν ἐδεῖτο Διονυσίου περὶ ἐμοῦ, λέγων ὅτι βουλοίμην ἀπιέναι, καὶ μηδαμῶς ἄλλως ποιεῖν. ὁ δὲ συνωμολόγησεν καὶ ἀπέπεμψεν ἐφόδια δούς, τῶν Δίωνος δὲ χρημάτων οὔτʼ ἐγὼ ἔτι ἀπῄτουν οὔτε τις ἀπέδωκεν.ἐλθὼν δὲ εἰς Πελοπόννησον εἰς Ὀλυμπίαν, Δίωνα καταλαβὼν θεωροῦντα, ἤγγελλον τὰ γεγονότα· ὁ δὲ τὸν Δία ἐπιμαρτυράμενος εὐθὺς παρήγγελλεν ἐμοὶ καὶ τοῖς ἐμοῖς

dispatched a thirty-oared vessel, and with it one of themselves, called Lamiscus; and he, when he came, made request to Dionysius concerning me, saying that I was desirous to depart, and begging him by all means to give his consent. To this he agreed, and he sent me forth after giving me supplies for the journey; but as to Dion’s money, neither did I ask for any of it nor did anyone pay me any. On arriving at Olympia, in the Peloponnese, I came upon Dion, who was attending the Games; and I reported what had taken place. And he, calling Zeus to witness, was invoking me and my relatives and