מִחוּץ֙ תְּשַׁכֶּל־חֶ֔רֶב וּמֵחֲדָרִ֖ים אֵימָ֑ה גַּם־בָּחוּר֙ גַּם־בְּתוּלָ֔ה יוֹנֵ֖ק עִם־אִ֥ישׁ שֵׂיבָֽה׃
Ohne wird das Schwert trauern, und in den Kammern Schrecken; Sowohl den jungen Mann als auch die Jungfrau zu töten. Das Saugen mit dem Mann mit den grauen Haaren.
Rashi on Deuteronomy
מחוץ תשכל חרב WITHOUT, THE SWORD SHALL BEREAVE — This means, outside the city will the sword of the hostile troops bereave them,
Sforno on Deuteronomy
ומחדרים אימה, גם בחור גם בתולה, young men and women hiding in their houses will be made orphans.
Siftei Chakhamim
The chambers of his heart pound with terror, etc. If the verse is explained according to its plain meaning i.e., as referring to the chambers of his house, it should have said, “From his chambers there is פחד (fear).” The word פחד applies to something which is nearby, whereas אימה (terror) applies to something that is distant; As Rashi writes in parshas Beshalach (Shemos 15:16) on the verse, “Horror [and dread] fall upon them” (Maharan)