When it shall hail, coming down on the forest; rather, but it shall hail in the coming down (i.e. the destruction) of the forest. "The forest" has commonly been regarded as Assyria, on the strength of Isaiah 10:18, Isaiah 10:19, Isaiah 10:33, Isaiah 10:34.
Mr. Cheyne, however, suggests Judah, or the high and haughty ones of Judah, whose destruction was a necessary preliminary to the establishment of Christ's kingdom. May not God's enemies generally be meant?
The city. Nineveh (Lowth, Gesenius, Rosenmüller); Jerusalem (Delitzsch, Knobel, Cheyne, Kay); "the city in which the hostility of the world to Jehovah will, in the latter days, be centralized" (Drechsler, Nagel)—the "world-power," in fact.
The last view seems to give the best sense.