Rashi on Deuteronomy 32:25/רש"י על דברים ל״ב:כ״ה

1מחוץ תשכל חרב WITHOUT, THE SWORD SHALL BEREAVE — This means, outside the city will the sword of the hostile troops bereave them,

2ומחדרים אימה AND WITHIN, DREAD — when one flees and escapes, the recesses (חדרים) of his heart will vehemently beat out of dread, and he will gradually die through this (Sifrei Devarim 321:11). — Another explanation of ומחדרים אימה: In the house there will be the fear of pestilence, as it says, (Jeremiah 9:20) “For the death is come up into our windows" (cf. Bava Kamma 60b). So, too, did Onkelos translate it. — Another explanation of this verse: מחוץ תשכל חרב — the sword shall destroy them on account of what they have done in the streets (חוצה; the prefix מ denotes the cause: on account of the streets), as it is said, (Jeremiah 11:13) “According to the number of the streets of Jerusalem have you set up altars to the shameful thing” (Sifrei Devarim 321:12); ומחדרים אימה — on account of what they have done in the innermost chambers of their houses, as it is said, (Ezekiel 8:12) “[Have you seen] what the elders of the house of Israel do in the dark, every man in his marbled chambers?” (Sifrei Devarim 321:12)