Plato, Laws 848b

πωλεῖν. πῶς οὖν δὴ ταῦτα ὀρθότατα νέμοιτʼ ἄν; πρῶτον μὲν δῆλον ὅτι τῇ μὲν ἴσα, τῇ δʼ οὐκ ἴσα νέμομεν. πῶς λέγεις; χείρω που καὶ βελτίω τούτων ἕκαστα ἀνάγκη φύειν καὶ ἐκτρέφειν τὴν γῆν. πῶς γὰρ οὔ; τῷ μὲν τοίνυν τοιούτῳ τῶν μερῶν, τριῶν ὄντων, μηδὲν πλέον ἐχέτω μήτε τοῖς δεσπόταις ἢ δούλοις νεμόμενον, μήτε αὖ τὸ τῶν ξένων, ἀλλὰ τὴν τῆς ὁμοιότητος ἰσότητα ἡ νομὴ

It is plain, to begin with, that our division is in one way equal, in another, unequal. How do you mean? Of each of these products of the soil, necessarily some parts are worse and some better. Of course. In respect of this, no one of the three shares shall have an undue advantage,—neither that given to the masters, nor that of the slaves, nor that of the foreigners,—but the distribution shall assign to all the same equality of similarity.