Matthew Poole and continuators on Jeremiah 4:29

29 The whole city shall flee, for the noise of the horsemen and bowmen, they shall go into thickets , and climb up upon the rocks: every city shall be forsaken, and not a man dwell therein.

Either upon the report of their coming, hereby as it were deriding their confidence, or rather at the approach of their vast Armies, for they were close besieged before they fled, as appears 2 Kings 25.4.

Such a consternation there shall be upon them, that they shall run into every hole to hide themselves; thus Manasseh was taken among the thorns, 2 Chron. 33.11. the Heb. is abim the clouds, possibly alluding to dark places on the tops of hills, reaching as it were to the clouds, or among the cloudy shades of Trees and Groves that usually grew there, the LXX render it Caves, and so the Rocks for shelter, or the clefts, Caves and hiding places in the Rocks, see Isa. 2.21.

The inhabitants of all ranks and qualities shall seek to escape the fury of this Chaldean Army, chap. 39.4.

There shall be an utter desolation, their Cities quite forsaken, not any to inhabit them, ver. 25.26.