Plato, Laws 868b

ἄλλα ἱερὰ μιαίνῃ, ὁ βουλόμενος, τόν τε ἐπιτρέποντα τῶν προσηκόντων τῷ τελευτήσαντι καὶ τὸν ἀποκτείναντα εἰς δίκην καταστήσας, τὴν διπλασίαν χρημάτων τε καὶ τῶν ἄλλων πράξεων ἀναγκαζέτω πράττειν τε καὶ ἐκτίνειν, τὸ δὲ ἔκτεισμα αὐτὸς αὑτῷ κομιζέσθω κατὰ τὸν νόμον. ἐὰν δέ τις θυμῷ δοῦλος δεσπότην αὑτοῦ κτείνῃ, τοὺς προσήκοντας τοῦ τελευτήσαντος χρωμένους τῷ κτείναντι χρείαν ἣν ἂν

both that member of the dead man’s kindred who permits this and the slayer himself, and shall compel the one of them to exact, and the other to pay, double the amount of the money-fines and of the other exactions; and the sum so paid he shall keep for himself as the law directs. If a slave kills his own master in rage, the kindred of the dead man shall treat the slayer how they please,—save that they must not