Plato, Laws 874d

πάντως καθαρὸς ἔστω.τὰ μὲν τοίνυν περὶ τροφήν τε ζώσης ψυχῆς καὶ παιδείαν, ὧν αὐτῇ τυχούσῃ μὲν βιωτόν, ἀτυχησάσῃ δὲ τοὐναντίον, καὶ περὶ θανάτων τῶν βιαίων ἃς δεῖ τιμωρίας γίγνεσθαι, νενομοθετήσθω· τὰ δὲ περὶ τὴν τῶν σωμάτων τροφὴν μὲν καὶ παιδείαν εἴρηται, τὸ δʼ ἐχόμενον τούτων, αἱ βίαιοι πράξεις ὑπʼ ἀλλήλων ἀκούσιοί τε καὶ ἑκούσιοι γιγνόμεναι διοριστέον εἰς δύναμιν αἵ τέ εἰσιν καὶ ὅσαι, καὶ ὧν ἂν

he shall be wholly guiltless. Thus let it be laid down by law respecting the nurture and training of living souls,—which when gained make life livable, but when missed, unlivable,—and respecting the punishments which ought to be imposed in cases of violent death. The regulations regarding the nurture and training of the body have been stated: but what comes next, namely, violent actions, both voluntary and involuntary, done by one against another,—these we must define as clearly as we can, stating their character and number