כִּ֣י שַׂ֤מְתָּ מֵעִיר֙ לַגָּ֔ל קִרְיָ֥ה בְצוּרָ֖ה לְמַפֵּלָ֑ה אַרְמ֤וֹן זָרִים֙ מֵעִ֔יר לְעוֹלָ֖ם לֹ֥א יִבָּנֶֽה׃
For Thou hast made of a city a heap, Of a fortified city a ruin; A castle of strangers to be no city, It shall never be built.
Ibn Ezra
For thou hast made a city an heap, etc. Many cities will be destroyed, when Gog and Magog3See xxiv., Notes 18 and 24.3See xxiv., Notes 18 and 24. will come. According to R. Moses Hakkohen it refers to the period of Sennacherib.
Rashi
a palace of strangers, because of the city Because of the iniquity they committed in Your city, that they destroyed it, You shall make its palaces a ruin, which shall never be rebuilt.