Plato, Laws 804d

μισθοῖς οἰκοῦντας ξένους διδάσκειν τε πάντα ὅσα πρὸς τὸν πόλεμόν ἐστιν μαθήματα τοὺς φοιτῶντας ὅσα τε πρὸς μουσικήν, οὐχ ὃν μὲν ἂν ὁ πατὴρ βούληται, φοιτῶντα, ὃν δʼ ἂν μή, ἐῶντα τὰς παιδείας, ἀλλὰ τὸ λεγόμενον πάντʼ ἄνδρα καὶ παῖδα κατὰ τὸ δυνατόν, ὡς τῆς πόλεως μᾶλλον ἢ τῶν γεννητόρων ὄντας, παιδευτέον ἐξ ἀνάγκης. τὰ αὐτὰ δὲ δὴ καὶ περὶ θηλειῶν ὁ μὲν ἐμὸς νόμος ἂν εἴποι πάντα ὅσαπερ

attracted by pay from abroad for each several subject, to instruct the pupils in all matters relating to war and to music; and no father shall either send his son as a pupil or keep him away from the training-school at his own sweet will, but every man jack of them all (as the saying goes) must, so far as possible, be compelled to be educated, inasmuch as they are children of the State even more than children of their parents. For females, too, my law will lay down the same regulations as for men, and training of an identical kind.