Plato, Laws 741a

κατακλυσμὸν φέρον νόσων, ἢ πολέμων φθορά, ἐλάττους δὲ πολὺ τοῦ τεταγμένου ἀριθμοῦ διʼ ὀρφανίας γένωνται, ἑκόντας μὲν οὐ δεῖ πολίτας παρεμβάλλειν νόθῃ παιδείᾳ πεπαιδευμένους, ἀνάγκην δὲ οὐδὲ θεὸς εἶναι λέγεται δυνατὸς βιάζεσθαι.ταῦτʼ οὖν δὴ τὸν νῦν λεγόμενον λόγον ἡμῖν φῶμεν παραινεῖν λέγοντα· ὦ πάντων ἀνδρῶν ἄριστοι, τὴν ὁμοιότητα καὶ ἰσότητα καὶ τὸ ταὐτὸν καὶ ὁμολογούμενον τιμῶντες κατὰ φύσιν μὴ ἀνίετε κατά τε ἀριθμὸν καὶ πᾶσαν δύναμιν

of disease or ruinous wars, and the houses fall much below the appointed number through bereavements, we ought not to introduce new citizens trained with a bastard training of our own free will,—but necessity (as the proverb runs) not even God himself can compel. Let us then suppose that our present discourse gives the following advice:—My most excellent friends, be not slack to pay honor, as Nature ordains, to similarity and equality and identity and congruity in respect of number