The Lord being now about to bring enemies upon them, he bespeaks them in martial language, by stirring them to a speedy provision, and warning of them of the nature of their approaching judgment; not famine or plague within them, but a foreign enemy from without, Jer 6 1, viz. the coming of Nebuchadnezzar and the Chaldeans. Cry, that your voice may be heard afar off, that all may hear. Gather together; either to unite your forces, or to take counsel what to do, that you may be in safety; the same thing with Assemble yourselves; implying that the calamity was general. Let us go into the defenced cities, to secure from these invasions that are coming upon us.
Related Commentaries of Jeremiah 4:5
Jeremiah 4:5
5 Declare ye in Judah, and publish in Jerusalem; and say, Blow ye the trumpet in the land: cry, gather together, and say, Assemble yourselves, and let us go into the defenced cities.