עזרא ט:ז פירוש: רש״י

we were delivered Heb. נִתַּנוּ, like נִתַּנְנוּ. The “dagesh” in the “nun” is instead of another “nun,” like (II Chron. 14:10): “for we rely (תִשְּׁעַנוּ) on You,” like נִשְּׁעַנְנוּ. (Gen. 34:16): “... then we will give (וְנָתַנוּ) our daughters,” like וְנָתַנְנוּ.

as of this day as appears this day, for the Ten Tribes have already been exiled, and many of the exiles still remain in Babylon.