וָאֵצְאָ֨ה בְשַֽׁעַר־הַגַּ֜יא לַ֗יְלָה וְאֶל־פְּנֵי֙ עֵ֣ין הַתַּנִּ֔ין וְאֶל־שַׁ֖עַר הָאַשְׁפֹּ֑ת וָאֱהִ֨י שֹׂבֵ֜ר בְּחוֹמֹ֤ת יְרוּשָׁלִַ֙ם֙ אֲשֶׁר־המפרוצים [הֵ֣ם ׀] [פְּרוּצִ֔ים] וּשְׁעָרֶ֖יהָ אֻכְּל֥וּ בָאֵֽשׁ׃
און איך בין אַרױס דורך דעם טױער פֿון טאָל בײַ נאַכט, און אַקעגן דעם שלאַנגענקװאַל, און צו דעם מיסטטױער, און איך האָב באַטראַכט די מױערן פֿון ירושָלַיִם װאָס זײַנען געװען אײַנגעבראָכן, און אירע טױערן װאָס זײַנען געװען פֿאַרצערט פֿון פֿײַער.
Rashi
And I went out through the Gate of the Valley I went out through that gate at night with the men who were with me toward En Hattannin and the Dung Gate in the wall of the city; and I broke the wall, and the wall was easily cast down and broken because it had been burned with fire.
Ibn Ezra
ואהי שובר And I surveyed - From "He will think (ויסבר) of changing" (Daniel 7:25). And from the language of the Sages of Blessed Memory: speculation (סברא). And the meaning is I was thinking about and studying the walls.
Rashi
which were breached which are those places that were breached, and they breached them more.