Charles Ellicott Commentary Lamentations 4:21

"Rejoice and be glad, O daughter of Edom, that dwellest in the land of Uz: The cup shall pass through unto thee also; thou shalt be drunken, and shalt make thyself naked." — Lamentations 4:21 (ASV)

O daughter of Edom. — The triumph of Edom in the downfall of Zion was, as in Psalms 137:0, the crowning sorrow of the mourner. But with this sorrow there is a vision of judgment, which is also a vision of hope; the prophet returning to his favourite image of the wine-cup (Jeremiah 25:17). On the “Land of Uz” see Notes on Job 1:1, Jeremiah 25:20.

Shalt make thyself naked. — See Note on Lamentations 1:8, and compare to Nahum 3:5 for a bolder form of the same image.