μήτε δίκην δικάσῃς πρίν ἀμφοῖν μῦθον ἀκούσῃς → do not give your judgement until you have heard a speech on both sides
Κοινὸν τῶν Ἀχαιῶν, σύστημα τῶν Ἀχαιῶν