Charles Ellicott Commentary Isaiah 22:5

"For it is a day of discomfiture, and of treading down, and of perplexity, from the Lord, Jehovah of hosts, in the valley of vision; a breaking down of the walls, and a crying to the mountains." — Isaiah 22:5 (ASV)

For it is a day of trouble. —The earlier clauses paint the mental emotions of the coming day of judgment. In the latter, we hear the actual crash of the battering-rams across the walls. The cry of the panic-stricken people will rise to the surrounding mountains, possibly towards the hills from where they expected help—either as true worshippers looking to Mount Zion (Psalms 121:1), or to the high places which were so long the objects of their worship, and which led their enemies to say that their gods were gods of the hills, and not of the valleys (1 Kings 20:23).