“On the Day of the LORD’s sacrifice I will punish the princes, the sons of the king, and all who are dressed in foreign apparel.
Notice is here given to Judah and Jerusalem that God is coming forth against them, and will be with them shortly; his presence, as a just avenger, his day, the day of his judgment and his wrath, are not far off, Zep 1:7.
Commenting on Zephaniah 1:7-13
And it shall come to pass in the day of the Lord's sacrifice, &c.] When the above sacrifice prepared shall be offered, and the slaughter of his people made, when his wrath shall be poured out upon them, within the time of its beginning and ending: that I will punish the princes, and the king's children; either the children of Josiah, who, though a good...
the princes--who ought to have been an example of good to others, but were ringleaders in all evil. the king's children--fulfilled on Zedekiah's children (Jer 39:6); and previously, on Jehoahaz and Eliakim, the sons of Josiah (Kg2 23:31, Kg2 23:36; Ch2 36:6; compare also Kg2 20:18; Kg2 21:13). Huldah the prophetess (Kg2 22:20) intimated that which Zephaniah now more expressly foretells.