ἐπεργασία
From LSJ
μή μοι θεοὺς καλοῦσα βουλεύου κακῶς· πειθαρχία γάρ ἐστι τῆς εὐπραξίας μήτηρ, γυνὴ Σωτῆρος· ὦδ᾽ ἔχει λόγος → When you invoke the gods, do not be ill-advised. For Obedience is the mother of Success, wife of Salvation—as the saying goes.
English (LSJ)
ἡ,
A cultivation of another's land, encroachment upon sacred ground (cf. foreg. 1.2), τῆς γῆς τῆς ἱερᾶς Th.1.139, cf. Pl.Lg.843c. II right of mutual tillage in each other's territory, X.Cyr.3.2.23. III treatment, discussion, Steph.in Hp.1.107 D.