Plato, Letters 338a

τῆς ἐν Σικελίᾳ διατριβῆς μοι διεπεράνθη, καθάπερ εἶπον, πρὶν συμβουλεύειν τοῖς οἰκείοις καὶ ἑταίροις τοῖς περὶ Δίωνα· τὸ μετʼ ἐκεῖνα δʼ οὖν ἔπεισα ὅπῃ δή ποτʼ ἐδυνάμην Διονύσιον ἀφεῖναί με, εἰρήνης δὲ γενομένης—ἦν γὰρ τότε πόλεμος ἐν Σικελίᾳ—συνωμολογήσαμεν ἀμφότεροι. Διονύσιος μὲν ἔφη μεταπέμψεσθαι Δίωνα καὶ ἐμὲ πάλιν, καταστησάμενος τὰ περὶ τὴν ἀρχὴν ἀσφαλέστερον ἑαυτῷ, Δίωνα δὲ ἠξίου

in Sicily before I gave my counsel to the intimates and companions of Dion. What happened next was this: I urged Dionysius by all means possible to let me go, and we both made a compact that when peace was concluded (for at that time there was war in Sicily ) Dionysius, for his part, should invite Dion and me back again, as soon as he had made his own power more secure; and he asked Dion to regard the position he was now in not as a form of exile