נחמיה ו:טז פירוש: רש״י

Now it came to pass when all our enemies heard this matter, that the construction of the wall was completed.

that all the nations became frightened when all the nations saw that the construction of the wall of the city had been completed.

and they fell very low in their own eyes They themselves fell in their own eyes; they despised themselves, for the fear of the Jews had fallen upon them.