Albert Barnes Commentary Jeremiah 25:18

"[to wit], Jerusalem, and the cities of Judah, and the kings thereof, and the princes thereof, to make them a desolation, an astonishment, a hissing, and a curse, as it is this day;" — Jeremiah 25:18 (ASV)

As it is this day - Words omitted by the Septuagint, and probably added by Jeremiah after the murder of Gedaliah had completed the ruin of the land.