μηδενί δίκην δικάσῃς πρίν ἀμφοῖν μῦθον ἀκούσῃς → do not give your judgement on anything until you have heard a speech on both sides
See back.
backwards and forwards V. πάλιν τε καὶ πρόσω (Eur., Hecuba 958); see to and fro under to.