Albert Barnes Commentary Jeremiah 4:27

"For thus saith Jehovah, The whole land shall be a desolation; yet will I not make a full end." — Jeremiah 4:27 (ASV)

Desolate - a waste.

One of the most striking points of prophecy is that however severe may be the judgment pronounced against Judah, there is always the reservation that the ruin shall not be complete (Jeremiah 3:14).