Albert Barnes Commentary Jeremiah 52:15

"Then Nebuzaradan the captain of the guard carried away captive of the poorest of the people, and the residue of the people that were left in the city, and those that fell away, that fell to the king of Babylon, and the residue of the multitude." — Jeremiah 52:15 (ASV)

Certain of the poor of the people, and - Omit (as in 2 Kings 25:11), being inserted through some confusion with Jeremiah 52:16.

Multitude - Possibly workmen. The object of Nebuchadnezzar was to people Babylon, not with paupers, but with men of a better class, artisans and workmen, who would enrich it.