The earth mourneth... — Lebanon, with its cedars, the Sharon (as we say, the Campagna), Bashan, with its oaks (Isaiah 2:13), Carmel, with its copse-wood, are the types of beauty and fertility, now languishing and decaying. Possibly the embassy referred to was sent in the autumn, so that the prophet saw in the natural features of that season the symbols of failure and decay.
Related Commentaries of Isaiah 33:9
Isaiah 33:9
9 The earth mourneth and languisheth: Lebanon is ashamed and hewn down: Sharon is like a wilderness; and Bashan and Carmel shake off their fruits.