ἑπτατειχεῖς
From LSJ
ἐπέμψατε ἀγγέλους τοῖς ἀλλήλοις ὥστε ἔγνωτε τὸν κίνδυνον → you sent messengers to one another so that you knew the danger
English (LSJ)
ἔξοδοι the
A seven outlets of the walls of Thebes, A.Th.285.
German (Pape)
[Seite 1013] ἔξοδοι, mit sieben Mauern, Thürmen, von Theben, Aesch. Spt. 266.