Plato, Laws 919d

ἀναισχυντίας τε καὶ ἀνελευθέρου ψυχῆς μέτοχα συμβήσεται γίγνεσθαι ῥᾳδίως. μετὰ δὴ τὰ νῦν εἰρημένα, περὶ ταῦτα νόμος ἀγαθῇ τύχῃ τοιόσδε ἡμῖν γιγνέσθω· Μαγνήτων, οὓς ὁ θεὸς ἀνορθῶν πάλιν κατοικίζει, γεωμόροι ὅσοι τῶν τετταράκοντα καὶ πεντακισχιλίων ἑστιῶν εἰσιν, μήτε κάπηλος ἑκὼν μηδʼ ἄκων μηδεὶς γιγνέσθω μηδʼ ἔμπορος μήτε διακονίαν μηδʼ ἥντινα κεκτημένος ἰδιώταις τοῖς μὴ ἐξ ἴσου ἑαυτῷ, πλὴν

by shamelessness and meanness of soul. After the declarations now made, let our law on these matters (Heaven prosper it!) run in this wise:—Amongst the Magnesians, whom the god is restoring and founding afresh, none of all the landholders who belong to the houses shall, either willingly or unwillingly, become a retail trader or a merchant, or engage in any menial service for private persons who do not make an equal return to himself, save only for his father and mother