Plato, Republic, book 1 138:

καὶ ὅταν δὴ δρέπανον δέῃ φυλάττειν, ἡ δικαιοσύνη χρήσιμοσ καὶ κοινῇ καὶ ἰδίᾳ· ὅταν δὲ χρῆσθαι, ἡ ἀμπελουργική;