Plato, Laws 767d

θεὸν ὀμόσαντας οἷον ἀπάρξασθαι πάσης ἀρχῆς ἕνα δικαστήν, ὃς ἂν ἐν ἀρχῇ ἑκάστῃ ἄριστός τε εἶναι δόξῃ καὶ ἄριστʼ ἂν καὶ ὁσιώτατα τὰς δίκας τοῖς πολίταις αὐτῷ τὸν ἐπιόντα ἐνιαυτὸν φαίνηται διακρίνειν. τούτων δὲ αἱρεθέντων γίγνεσθαι μὲν δοκιμασίαν ἐν τοῖς ἑλομένοις αὐτοῖς, ἐὰν δὲ ἀποδοκιμασθῇ τις, ἕτερον ἀνθαιρεῖσθαι κατὰ ταὐτά, τοὺς δὲ δοκιμασθέντας δικάζειν μὲν τοῖς τἆλλα δικαστήρια φυγοῦσι, τὴν δὲ ψῆφον φανερὰν φέρειν· ἐπηκόους δʼ εἶναι καὶ θεατὰς

they shall dedicate, so to say, one judge from each body of officials, namely, that member of each body whom they deem the best man and the most likely to decide the suits for his fellow-citizens during the ensuing year in the best and holiest way. These being chosen, they shall undergo a scrutiny before those who have chosen them; and should any be disqualified, they shall choose a substitute in like manner. Those who pass the scrutiny shall act as judges for those who have escaped the other courts, and they shall cast their votes openly.