μήτε δίκην δικάσῃς πρίν ἀμφοῖν μῦθον ἀκούσῃς → do not give your judgement until you have heard a speech on both sides
V. εὔθηλος, εὐθηλούμενος (Aesch., Fragment).
the fatted calf: V. εὔθηλος πόρις (Euripides, Bacchae 737).