He that ... falleth to the Chaldeans - This was to counsel desertion, and would have been treason in an ordinary man: but the prophets Spoke with an authority above that even of the king, and constantly interfered in political matters with summary decisiveness. Compare Matthew 24:16-18.
A prey - Something not a man’s own, upon which he seizes in the midst of danger, and hurries away with it. So must the Jews hurry away with their lives as something more than they had a right to, and place them in the Chaldaean camp as in a place of safety.