Albert Barnes Commentary Jeremiah 4:13

"Behold, he shall come up as clouds, and his chariots [shall be] as the whirlwind: his horses are swifter than eagles. Woe unto us! for we are ruined." — Jeremiah 4:13 (ASV)

His troops move on in large masses like dark threatening clouds (Joel 2:2).

Woe unto us! for we are spoiled - Jeremiah’s own cry of grief.