μήτε δίκην δικάσῃς πρίν ἀμφοῖν μῦθον ἀκούσῃς → do not give your judgement until you have heard a speech on both sides
subs.
P. and V. σφραγίς, ἡ, Ar. and P. δακτύλιος, ὁ.
