"But weep for the one that goes (into exile)": This is Yehoyachin king of Judah. What is written of him? (Ibid. 52:53) "He changed (from) his prison clothing, etc." — whence we learn that the corpse of Yehoyakim king of Judah which was cast to the heat of day and the cold of night was to be preferred to the life of (the exile), Yehoyachin king of Judah, whose seat was above that of all the kings, and who ate and drank in the chamber of kings!
Variantly: "and you will go lost quickly": I will exile you immediately and give you no grace period. And if you ask: But the men of the generation of the flood had a grace period of a hundred and twenty years (viz. Bereshith 6:3), the generation of the men of the flood had no one from whom to learn — you have someone from whom to learn!