Plato, Laws 847d

περὶ δὲ ὅπλων καὶ ὅσα περὶ τὸν πόλεμον ἅπαντα ὄργανα, ἐάν τινος ἢ τέχνης εἰσαγωγίμου δέῃ γίγνεσθαι ἢ φυτοῦ ἢ μεταλλευτικοῦ κτήματος ἢ δεσμευτικοῦ ἢ ζῴων τινῶν ἕνεκα τῆς τοιαύτης χρείας, ἵππαρχοι καὶ στρατηγοὶ τούτων ἔστωσαν κύριοι εἰσαγωγῆς τε καὶ ἐξαγωγῆς, διδούσης τε ἅμα καὶ δεχομένης τῆς πόλεως, νόμους δὲ περὶ τούτων νομοφύλακες τοὺς πρέποντάς τε καὶ ἱκανοὺς θήσουσι· καπηλείαν δὲ ἕνεκα χρηματισμῶν μήτε οὖν τούτου μήτε ἄλλου μηδενὸς ἐν τῇ

if there is need to import any craft or plant or metal or rope or animal for military purposes, the hipparchs and generals shall have control of both imports and exports, when the State both gives and takes, and the Law-wardens shall enact suitable and adequate laws therefor; but no trading for the sake of gain, either in this matter or in any other, shall be carried on anywhere within the boundaries of our