Plato, Laws 915b

μᾶλλον· τὸ δὲ πλέον γιγνέσθω τοῦ δεσπότου. μὴ πλείω δὲ εἴκοσιν ἐτῶν μένειν τὸν ἀφεθέντα, ἀλλὰ καθάπερ καὶ τοὺς ἄλλους ξένους ἀπιέναι λαβόντα τὴν αὑτοῦ πᾶσαν οὐσίαν, ἐὰν μὴ πείσῃ τούς τε ἄρχοντας καὶ τὸν ἀπελευθερώσαντα. ἐὰν δὲ τῷ ἀπελευθερωθέντι ἢ καὶ τῶν ἄλλων τῳ ξένων οὐσία πλείων γίγνηται τοῦ τρίτου μεγέθει τιμήματος, ᾗ ἂν τοῦτο ἡμέρᾳ γένηται, τριάκοντα ἡμερῶν ἀπὸ ταύτης τῆς

and, if he is, the excess shall be made to his master. He that is let go free shall not remain in the country more than twenty years, but shall depart, like all other foreigners, taking with him all the property he owns, unless he gains the consent of the magistrates and also of the man who freed him. And if a freedman, or any other foreigner, acquired property exceeding in amount the third evaluation, within thirty days from the day on which he acquires this excess he shall take his own property and depart,