Plato, Laws 920a

τοῦ τοιούτου, καὶ ἐὰν αὖθις, ἔτη δύο, καὶ ἐφʼ ἑκάστης ἁλώσεως τοὺς δεσμοὺς μὴ παυέσθω διπλασιάζων τὸν ἔμπροσθεν χρόνον. δεύτερος μὴν νόμος· Μέτοικον εἶναι χρεὼν ἢ ξένον, ὃς ἂν μέλλῃ καπηλεύσειν· τὸ δὲ τρίτον καὶ τρίτος· ὅπως ὡς ἄριστος ἢ καὶ κακὸς ὡς ἥκιστα ὁ τοιοῦτος ἡμῖν ᾖ σύνοικος ἐν τῇ πόλει, τοὺς νομοφύλακας χρὴ νοῆσαι φύλακας εἶναι μὴ μόνον ἐκείνων οὓς φυλάττειν ῥᾴδιον μὴ παρανόμους καὶ κακοὺς γίγνεσθαι, ὅσοι γενέσει καὶ τροφαῖς εὖ πεπαίδευνται,

if he repeats the offence, he shall get two years’ imprisonment, and for each subsequent conviction the period of imprisonment shall go on being doubled. Now comes a second law:—Whosoever intends to engage in retail trade must be a resident alien or a foreigner. And thirdly, this third law:—In order that such an one may be as good as possible, or as little as possible bad, he being a resident in our State, the Law-wardens must bear in mind that they are guardians not only of those who, being well-trained both by birth and nurture, are easy to guard from lawless and evil ways, but also of those who are otherwise,