ᾗπερ τῶν τειχῶν ἀμφοτέρων αἱ ἐργασίαι ἔληγον

From LSJ

ἐνίοτε οἱ οἰκέται εἰς τὴν θάλασσαν ἐλαύνουσιν αὐτούς → sometimes the slaves ride them into the sea

Source

English > Greek (Woodhouse Quotes Reversed)

where the construction of both walls came to an end