A Pious Prayer

Aeschylus, Libation Bearers 122-123 (tr. Alan H. Sommerstein):

                              ELECTRA
And is this a righteous thing for me to ask of the gods?
                              CHORUS
How could it not be—to return your enemy evil for evil?

                              ΗΛΕΚΤΡΑ
καὶ ταῦτά μοὔστιν εὐσεβῆ θεῶν πάρα;
                              ΧΟΡΟΣ
πῶς δ᾿ οὔ, τὸν ἐχθρόν γ᾿ ἀνταμείβεσθαι κακοῖς;