Plato, Laws 871b

—ὁ δὲ μὴ ἐπεξιὼν δέον, ἢ μὴ προαγορεύων εἴργεσθαι, τῶν ἐντὸς ἀνεψιότητος, πρὸς ἀνδρῶν τε καὶ γυναικῶν προσήκων τῷ τελευτήσαντι, πρῶτον μὲν τὸ μίασμα εἰς αὑτὸν καὶ τὴν τῶν θεῶν ἔχθραν δέχοιτο, ὡς ἡ τοῦ νόμου ἀρὰ τὴν φήμην προτρέπεται, τὸ δὲ δεύτερον ὑπόδικος τῷ ἐθέλοντι τιμωρεῖν ὑπὲρ τοῦ τελευτήσαντος γιγνέσθω. ὁ δὲ ἐθέλων τιμωρεῖν, τῶν τε ἐπὶ τούτοις λουτρῶν φυλακῆς πέρι καὶ ὅσων ἂν ἑτέρων

or fails to warn him of the fact that he is thus debarred, if he be of kin to the dead man on either the male or female side, and not further removed than a cousin, shall, first, receive upon himself the defilement and the wrath of the gods, since the curse of the law brings also upon him that of the divine voice, and, secondly, he shall be liable to the action of whosoever pleases to punish him on behalf of the dead man. And he that wishes to punish him shall duly perform all that concerns the observance of the purifications proper therefore, and whatsoever else the god prescribes as lawful in these cases,