הֵילִ֤ילִֽי שַׁ֙עַר֙ זַֽעֲקִי־עִ֔יר נָמ֖וֹג פְּלֶ֣שֶׁת כֻּלֵּ֑ךְ כִּ֤י מִצָּפוֹן֙ עָשָׁ֣ן בָּ֔א וְאֵ֥ין בּוֹדֵ֖ד בְּמוֹעָדָֽיו׃
城門啊，要哀號！城邑啊，要呼喊！非利士啊，你全地都消融了！因為有煙從北方而來；到了他所定的日期，沒有一個人掉隊。
Rashi
for from the North smoke has come Retribution harsh as smoke shall come upon them from the north. Gaza and its boundaries, which Hezekiah smote, were in the south of Eretz Israel in the southwestern corner. Eretz Israel is found to be north of it. And so we find in Sifrei in Ha’azinu 322: They attempted to flee through the south, and they turned them over, as it is stated (Amos 1:6): “For three transgressions of Gaza... [because of their exiling a complete exile to deliver to Edom.]” Hence, we learn that Gaza is on the south.
Rashi
and there is no straggler in his ranks Jonathan renders: And there is no straggler among his appointed ones, i.e., in his ranks whom he appointed to come upon them, and no one delays his steps to be secluded and to come in seclusion alone, but all of them shall come as one, with strength.