Albert Barnes Commentary Jeremiah 46:14

"Declare ye in Egypt, and publish in Migdol, and publish in Memphis and in Tahpanhes: say ye, Stand forth, and prepare thee; for the sword hath devoured round about thee." — Jeremiah 46:14 (ASV)

The sword shall devour — The sword has devoured those round about thee. One after another the nations have been consumed by Nebuchadnezzar; and now at last Tyre, which so long had withstood him, has fallen, and his forces are about to fall upon Egypt (see note on Jeremiah 2:16). Hence, the summons to arrange themselves in their ranks, and to prepare for battle by putting on their armor.