Plato, Laws 865d

τούτων δʼ ἐξηγητὰς εἶναι κυρίους οὓς ἂν ὁ θεὸς ἀνέλῃ· ἐὰν δὲ αὑτοῦ δοῦλον, καθηράμενος ἀπαλλαττέσθω τοῦ φόνου κατὰ νόμον. ἐὰν δέ τις ἐλεύθερον ἄκων ἀποκτείνῃ, τοὺς μὲν καθαρμοὺς τοὺς αὐτοὺς καθαρθήτω τῷ τὸν δοῦλον ἀποκτείναντι, παλαιὸν δέ τινα τῶν ἀρχαίων μύθων λεγόμενον μὴ ἀτιμαζέτω. λέγεται δὲ ὡς ὁ θανατωθεὶς ἄρα βιαίως, ἐν ἐλευθέρῳ φρονήματι βεβιωκώς, θυμοῦταί τε τῷ

who kill a man at games, and those interpreters whom the oracle names shall be in charge of these rites; but if it be a slave of his own that he has killed, he shall be set free after the legal purification. And if anyone kill a free man involuntarily, he shall undergo the same purifications as the man that has killed a slave; and there is an ancient tale, told of old, to which he must not fail to pay regard. The tale is this,—that the man slain by violence, who has lived in a free and proud spirit, is wroth with his slayer when newly slain,