Plato, Laws 946a

ἄνδρας αὑτῶν τρεῖς, ὃν ἂν ἕκαστος αὐτῶν ἡγῆται πάντῃ ἄριστον εἶναι, πλὴν αὑτοῦ, μὴ ἔλαττον πεντήκοντα γεγονότα ἐτῶν. τῶν δὲ προκριθέντων οὓς ἂν πλεῖστοι ἐνέγκωσι, τούτους ἐκλέξαι μέχρι τῶν ἡμίσεων, ἐὰν ἄρτιοι γίγνωνται, περιττοὶ δὲ ἐὰν ὦσιν, ἕνα ἀφελεῖν, ᾧ ἂν ἐλάχισται γένωνται, καταλιπεῖν δὲ τοὺς ἡμίσεις αὐτῶν πλήθει τῶν ψήφων ἀποκρίναντας, ἐὰν δέ τισιν ἴσαι γίγνωνται καὶ τὸν ἥμισυν ἀριθμὸν πλείω ποιῶσιν, ἀφελεῖν τὸ πλέον ἀποκρίναντας

each citizen proposing that man, not less than fifty years old, whom (with the exception of himself) he regards as in all respects the best. Of those so nominated they shall choose out those who have gained most votes—half of the total number nominated, if that number be even, but if it be an odd number, they shall reject the one who has least votes and retain the even half, marking them off according to the number of the votes received; and if several have an equal number of votes, thus causing the upper half-section to be too large, they shall remove the excess by rejecting those that are youngest;