Diogenes Laertius, Lives of the Philosophers
6.3 (life of Antisthenes; tr. R.D. Hicks, with his note):
When a lad from Pontus was about to attend his lectures, and asked him what he required, the answer was, "Come with a new book, a new pen, and new tablets, if you have a mind to" (implying the need of brains as well).a
a There is the same untranslateable pun upon καινοῦ = "new" and καὶ νοῦ = "a mind too," as in ii. § 118.
πρός τε τὸ Ποντικὸν μειράκιον μέλλον φοιτᾶν αὐτῷ καὶ πυθόμενον
τίνων αὐτῷ δεῖ, φησί, "βιβλαρίου καινοῦ καὶ γραφείου καινοῦ
καὶ πινακιδίου καινοῦ," τὸν νοῦν παρεμφαίνων.
ter F: καὶ νοῦ ter ΒΡΦ et Arsen.