The words seem to be the prophet's words of advice to this people, to make all the haste they could away, and to secure themselves as well as they could, because the king of Babylon had certainly been taking counsel against them, and was resolved to disturb them. See Jeremiah 49:8, where the like counsel is given to the Edomites.
Related Commentaries of Jeremiah 49:30
Jeremiah 49:30
30 Flee, getd you far off, dwell deep, O ye inhabitants of Hazor, saith the LORD; for Nebuchadrezzar king of Babylon hath taken counsel against you, and hath conceived a purpose against you.