ἐν σφίσι κατὰ τὰς ἰδίας διαφορὰς περιπεσόντες ἐσφάλησαν

From LSJ

ἕως τοῦ ἔξω τόπου περισπᾶται → be drawn away and expanded

Source

English > Greek (Woodhouse Quotes Reversed)

they were ruined by falling a prey to personal quarrels