ἐπέμψατε ἀγγέλους τοῖς ἀλλήλοις ὥστε ἔγνωτε τὸν κίνδυνον → you sent messengers to one another so that you knew the danger
v. εἴργω.
εἶργμαι: и εἷργμαι pf. pass. к εἴργω и εἵργω.