Plato, Laws 801d

ἢ καλὰ ἢ ἀγαθὰ μηδὲν ποιεῖν ἄλλο, τὰ δὲ ποιηθέντα μὴ ἐξεῖναι τῶν ἰδιωτῶν μηδενὶ πρότερον δεικνύναι, πρὶν ἂν αὐτοῖς τοῖς περὶ ταῦτα ἀποδεδειγμένοις κριταῖς καὶ τοῖς νομοφύλαξιν δειχθῇ καὶ ἀρέσῃ· σχεδὸν δὲ ἀποδεδειγμένοι εἰσὶν ἡμῖν οὓς εἱλόμεθα νομοθέτας περὶ τὰ μουσικὰ καὶ τὸν τῆς παιδείας ἐπιμελητήν. τί οὖν; ὃ πολλάκις ἐρωτῶ, κείσθω νόμος ἡμῖν καὶ τύπος ἐκμαγεῖόν τε τρίτον τοῦτο; ἢ πῶς δοκεῖ; κείσθω· τί μήν;

his compositions to any private person until they have first been shown to the judges appointed to deal with these matters, and to the Law-wardens, and have been approved by them. And in fact we have judges appointed in those whom we selected to be the legislators of music and in the supervisor of education. Well then, I repeat my question,—is this to be laid down as our third law, typical case, and example? What think you? Be it laid down by all means. Next to these, it will be most proper to sing hymns and praise to the gods, coupled with prayers; and after the gods will come prayers combined with praise to daemons and heroes, as is befitting to each. To be sure.