Jeremiah 50:41-42

Babylon’s invader would be an innumerable, vast, mighty army that would descend on her from the remote parts of the north. The Persians and their allies did not come from remote regions; they were the neighbors of the Babylonians. This invader would come with bows and javelins and would fight cruelly and unmercifully. The sound of its approach would be like the roaring sea. The soldiers would ride horses and proceed against the Babylonians with discipline. Babylon would be like a young girl in comparison. Whereas Cyrus’ army contained a variety of vassal contingents (cf. Jeremiah 51:27-28), he took the city by stealth. Thus the destruction envisioned here is probably a future one.