Plato, Letters 309c

ὅπερ ἔδωκας εἰς ἀποστολήν, ἄγει σοι Βακχεῖος ὁ τὴν ἐπιστολὴν φέρων· οὔτε γὰρ ἐφόδιον ἐκεῖνό γʼ ἦν ἱκανὸν οὔτε πρὸς τὸν ἄλλον βίον συμφέρον, ἀδοξίαν δὲ πλείστην τῷ διδόντι σοὶ παρασκευάζον, οὐ πολλῷ δὲ ἐλάττω κἀμοὶ λαμβάνοντι, διόπερ οὐ λαμβάνω. σοὶ δʼ οὐδὲν διαφέρει δῆλον ὅτι καὶ λαβεῖν καὶ δοῦναι τοσοῦτον, ὥστε κομισάμενος ἄλλον τινὰ τῶν ἑταίρων θεράπευσον ὥσπερ ἐμέ· κἀγὼ γὰρ

which you gave for my journey home, Baccheius, the bearer of this letter, is taking it back to you. For it was neither a sufficient sum for my journey nor was it otherwise useful for my support; and since it reflects the greatest disgrace on you who offer it, and not much less on me if I accept it, I therefore refuse to accept it. But evidently neither the giving nor the accepting of such an amount makes any difference to you; take it, then, and befriend therewith some other companion of yours as you did me; for I, in sooth, have had enough of your befriending.