Plato, Letters 363d

νεωτέρους, καὶ τοὺς συσφαιριστὰς ἀσπάζου ὑπὲρ ἐμοῦ, καὶ πρόσταττε τοῖς τε ἄλλοις καὶ Ἀριστοκρίτῳ, ἐάν τις παρʼ ἐμοῦ λόγος ἢ ἐπιστολὴ ἴῃ παρὰ σέ, ἐπιμελεῖσθαι ὅπως ὡς τάχιστα σὺ αἴσθῃ, καὶ ὑπομιμνῄσκειν σε ἵνα ἐπιμελῇ τῶν ἐπισταλέντων. καὶ νῦν Λεπτίνῃ τῆς ἀποδόσεως τοῦ ἀργυρίου μὴ ἀμελήσῃς, ἀλλʼ ὡς τάχιστα ἀπόδος, ἵνα καὶ οἱ ἄλλοι πρὸς τοῦτον ὁρῶντες προθυμότεροι ὦσιν ἡμῖν ὑπηρετεῖν.

all the other young men; and greet for me your comrades at the game of ball ; and charge Aristocritus, as well as the rest, that if any message or letter from me should come to your palace, he must take care that you are informed of it as soon as possible; and bid him remind you not to neglect the contents of my letters. So too now, do not neglect to repay Leptines his money, but pay it back as promptly as possible, in order that the others also, seeing how you deal with him, may be the more ready to assist us.