Plato, Letters 363a

Κρατίνῳ τῷ Τιμοθέου μὲν ἀδελφῷ, ἐμῷ δʼ ἑταίρῳ, θώρακα δωρησώμεθα ὁπλιτικὸν τῶν μαλακῶν τῶν πεζῶν, καὶ ταῖς κέβητος θυγατράσι χιτώνια τρία ἑπταπήχη, μὴ τῶν πολυτελῶν τῶν Ἀμοργίνων, ἀλλὰ τῶν Σικελικῶν τῶν λινῶν. ἐπιεικῶς δὲ γιγνώσκεις τοὔνομα κέβητος· γεγραμμένος γάρ ἐστιν ἐν τοῖς Σωκρατείοις λόγοις μετὰ Σιμμίου Σωκράτει διαλεγόμενος ἐν τῷ περὶ ψυχῆς λόγῳ, ἀνὴρ πᾶσιν ἡμῖν οἰκεῖός τε καὶ εὔνους.

To Cratinus the brother of Timotheus, and my own companion, let us present a hoplite’s corslet, one of the soft kind for foot-soldiers; and to the daughters of Cebes three tunics of seven cubits, not made of the costly Amorgos stuff but of the Sicilian linen. The name of Cebes you probably know; for he is mentioned in writing in the Socratic discourses as conversing with Socrates, in company with Simmias, in the discourse concerning the Soul, he being an intimate and kindly friend of us all.