John Trapp on Lamentations 4:21

Ver. 21. Rejoyce and be glad] This is ſpoken to Edom by a certain Ironical and bitter conceſſion: q. d. Do ſo if thou haſt any mind to it: but thou ſhalt ſoon be made to change thy chear. Thy flearing at us ſhall be ſoon turned into fearing for thy ſelf: thy mirth into mourning.

That dwelleſt in the land of Ʋz] Job's country, called alſo Siria, ſaith R. Solomon, and haply from Seir. Evil is at next door by to thoſe who rejoyce at the evils of others.

The cup ſhall paſſe through unto thee] The quaſſing cup of Gods Wrath, Jer. 25.18, 29.

And ſhalt make thy ſelf naked] To the ſcorn of all: Ʋt ebria & omotae mentis. as drunkards who are void of ſhame and common honeſty, baring thoſe parts that nature would have covered, See Jer. 49.10.