Plato, Letters 349b

ὁ Θεοδότης, λαβόμενος τῆς χειρὸς ἐδάκρυσέν τε καὶ ἱκέτευεν μηδὲν τοιοῦτον ποιεῖν, ὑπολαβὼν δʼ ἐγὼ παραμυθούμενος, θάρρει, Θεοδότα, ἔφην· οὐ γὰρ τολμήσει Διονύσιος παρὰ τὰ χθὲς ὡμολογημένα ἄλλα ποτὲ δρᾶν. καὶ ὃς ἐμβλέψας μοι καὶ μάλα τυραννικῶς, σοί, ἔφη, ἐγὼ οὔτε τι σμικρὸν οὔτε μέγα ὡμολόγησα. νὴ τοὺς θεούς, ἦν δʼ ἐγώ, σύ γε, ταῦτα ἃ σοῦ νῦν οὗτος δεῖται μὴ ποιεῖν· καὶ εἰπὼν ταῦτα ἀποστρεφόμενος ᾠχόμην ἔξω. τὸ μετὰ

to do no such thing. And I interposed and said by way of encouragement—Cheer up, Theodotes; for Dionysius will never dare to act otherwise contrary to yesterday’s agreement. Then Dionysius, with a highly tyrannical glare at me, said— With you I made no agreement, great or small. Heaven is witness, I replied, that you did,—not to do what this man is now begging you not to do. And when I had said this I turned away and went out. After this Dionysius kept on hunting after Heracleides,