Plato, Laws 946c

Ἀπόλλωνι κατὰ τὸν παλαιὸν νόμον ἀνατίθησι κοινὸν καὶ Ἡλίῳ, ὅσονπερ ἂν ἕπωνται χρόνον τῇ κρίσει. τούτους δὲ πρώτῳ μὲν ἐνιαυτῷ δώδεκα εὐθύνους ἀποδεῖξαι, μέχριπερ ἂν ἑκάστῳ πέντε καὶ ἑβδομήκοντα ἔτη συμβῇ γενόμενα, τὸ λοιπὸν δὲ τρεῖς ἀεὶ προσγιγνέσθων κατʼ ἐνιαυτόν· οὗτοι δὲ τὰς ἀρχὰς πάσας δώδεκα μέρη διελόμενοι πάσαις βασάνοις χρώμενοι ἐλευθέραις ἐλεγχόντων. οἰκούντων δέ, ὅσον ἂν

according to the ancient law, as a joint offering to Apollo and Helios of its choicest first fruits, for so long a time as they pursue their judicial task. Twelve such examiners shall be appointed in the first year, until each of them has come to the age of seventy-five; and thereafter three shall be added annually. And they, after dividing all the public offices into twelve sections, shall employ all tests, of a gentlemanly kind, in investigating them. So long as they are serving as examiners, they shall reside within the precincts of Apollo and Helios,