Plato, Laws 913a

τὸ δὴ μετὰ ταῦτʼ εἴη συμβολαίων ἂν πρὸς ἀλλήλους ἡμῖν δεόμενα προσηκούσης τάξεως. ἁπλοῦν δέ γέ ἐστίν που τό γε τοιοῦτον· μήτε οὖν τις τῶν ἐμῶν χρημάτων ἅπτοιτο εἰς δύναμιν, μηδʼ αὖ κινήσειεν μηδὲ τὸ βραχύτατον ἐμὲ μηδαμῇ μηδαμῶς πείθων· κατὰ ταὐτὰ δὲ ταῦτα καὶ περὶ τὰ τῶν ἄλλων ἐγὼ δρῴην, νοῦν ἔχων ἔμφρονα. θησαυρὸν δὴ λέγωμεν πρῶτον τῶν τοιούτων ὅν τις αὑτῷ καὶ τοῖς αὑτοῦ κειμήλιον ἔθετο, μὴ τῶν ἐμῶν ὢν πατέρων· μήθʼ

In the next place our business transactions one with another will require proper regulation. The following will serve for a comprehensive rule:—as far as possible, no one shall touch my goods nor move them in the slightest degree, if he has in no wise at all got my consent; and I must act in like manner regarding the goods of all other men, keeping prudent mind. As the first of such things let us mention treasure: that which a man has laid by in store for himself and his family (he not being one of my parents), I must never pray to the gods to find,