Plato, Letters 358b

ἅμα γὰρ συμβαίνει καὶ χώραν καταλιμπάνειν φαύλοις ἀνθρώποις, οἳ οὐκ ἀπὸ τοῦ βελτίστου πρὸς τὰ κοινὰ προσέρχονται. περὶ τούτων μὲν οὖν ἱκανῶς, Ἐχεκράτους δὲ καὶ νῦν ἐπιμέλειαν ἔχομεν καὶ εἰς τὸν λοιπὸν χρόνον ἕξομεν καὶ διὰ σὲ καὶ διὰ τὸν πατέρα αὐτοῦ Φρυνίωνα καὶ διʼ αὐτὸν τὸν νεανίσκον.

to worthless men who engage in public affairs from motives that are by no means the best. Enough, however, of this subject. We are looking after Echecrates now and we shall do so in the future also, for your sake and that of his father Phrynion, as well as for the sake of the youth himself.