Plato, Laws 759c

γίγνεσθαι, κληροῦν οὕτω τῇ θείᾳ τύχῃ ἀποδιδόντα, δοκιμάζειν δὲ τὸν ἀεὶ λαγχάνοντα πρῶτον μὲν ὁλόκληρον καὶ γνήσιον, ἔπειτα ὡς ὅτι μάλιστα ἐκ καθαρευουσῶν οἰκήσεων, φόνου δὲ ἁγνὸν καὶ πάντων τῶν περὶ τὰ τοιαῦτα εἰς τὰ θεῖα ἁμαρτανομένων αὐτὸν καὶ πατέρα καὶ μητέρα κατὰ ταὐτὰ βεβιωκότας. ἐκ Δελφῶν δὲ χρὴ νόμους περὶ τὰ θεῖα πάντα κομισαμένους καὶ καταστήσαντας ἐπʼ αὐτοῖς ἐξηγητάς,

we shall entrust it to the god himself to ensure his own good pleasure, by committing their appointment to the divine chance of the lot; but each person who gains the lot we shall test, first, as to whether he is sound and true-born, and secondly, as to whether he comes from houses that are as pure as possible, being himself clean from murder and all such offences against religion, and of parents that have lived by the same rule. They ought to bring from Delphi laws about all matters of religion, and appoint interpreters thereof, and make use of those laws.