Plato, Laws 634d

οὐ γὰρ ἄν, ὦ Κλεινία, τηλικοῖσδε ἀνδράσιν πρέποι τὸ τοιοῦτον. οὐ γὰρ οὖν. εἰ μὲν τοίνυν ὀρθῶς ἢ μή τις ἐπιτιμᾷ τῇ τε Λακωνικῇ καὶ τῇ Κρητικῇ πολιτείᾳ, λόγος ἂν ἕτερος εἴη· τὰ δʼ οὖν λεγόμενα πρὸς τῶν πολλῶν ἴσως ἐγὼ μᾶλλον ἔχοιμʼ ἂν ὑμῶν ἀμφοτέρων λέγειν. ὑμῖν μὲν γάρ, εἴπερ καὶ μετρίως κατεσκεύασται τὰ τῶν νόμων, εἷς τῶν καλλίστων ἂν εἴη νόμων μὴ ζητεῖν τῶν νέων μηδένα ἐᾶν ποῖα καλῶς

You are right, Stranger: that is what we must do. Yes, for resentment would ill become men of our years. Ill indeed. Whether men are right or wrong in their censures of the Laconian polity and the Cretan—that is another story; anyhow, what is actually said by most men I, probably, am in a better position to state than either of you. For in your case (your laws being wisely framed) one of the best of your laws will be that which enjoins that none of the youth shall inquire which laws are wrong