י֥וֹם שׁוֹפָ֖ר וּתְרוּעָ֑ה עַ֚ל הֶעָרִ֣ים הַבְּצֻר֔וֹת וְעַ֖ל הַפִּנּ֥וֹת הַגְּבֹהֽוֹת׃
A day of the horn and alarm, Against the fortified cities, and against the high towers.
Read midrashic interpretation of Zephaniah 1:16: and classical rabbinic exegesis.