Plato, Laws 788b

ἑκάστων λύπης τε καὶ ἡδονῆς καὶ ἐπιθυμίας ἕτερα παρὰ τὰς τοῦ νομοθέτου συμβουλὰς παραγενόμενα, παντοδαπὰ καὶ οὐχ ὅμοια ἀλλήλοις ἀπεργάζοιτʼ ἂν τὰ τῶν πολιτῶν ἤθη. τοῦτο δὲ κακὸν ταῖς πόλεσιν· καὶ γὰρ διὰ σμικρότητα αὐτῶν καὶ πυκνότητα ἐπιζήμια τιθέντα ποιεῖν νόμους ἀπρεπὲς ἅμα καὶ ἄσχημον, διαφθείρει δὲ καὶ τοὺς γραφῇ τεθέντας νόμους, ἐν τοῖς σμικροῖς καὶ πυκνοῖς ἐθισθέντων τῶν ἀνθρώπων παρανομεῖν.

and which contravene the instructions of the lawgiver; and these will produce in the citizens a multiplicity of contradictory tendencies. This is bad for a State. For while, on the one hand, it is improper and undignified to impose penalties on these practices by law, because of their triviality and the frequency of their occurrence, on the other hand, it detracts from the authority of the law which stands written when men grow used to breaking the law in trivial matters repeatedly.