ἐπιπρεσβεύομαι
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)
A go as ambassador, D.H.2.47. II. send an embassy, πρός τινα Id.6.56; τινί Plu.Sert.27,Ant.68. 2. send a second embassy, App.Gall.18.