Therefore shall Moab howl— The prophet, foreseeing that the Moabites would proudly reject the counsel he gave them, takes occasion thence to repeat and continue his tragical prophecy concerning the calamity which should happen to them by the divine determination. This prophesy is of the same argument with that preceding, and reaches to the 13th verse. It may be divided into three sentences; the first contained in the 7th and 8th verses; the second in the 9th and 10th; the third in the 11th and 12th. Kir-hasereth, or the city of the sun, seems without doubt to be the same with that mentioned in the first verse of the 15th chapter. Instead of foundations, Vitringa reads flaggons. Moab was famous for its vines, and for its flocks, and therefore the prophet takes his ideas principally from these.
Related Commentaries of Isaiah 16:7
Isaiah 16:7-8
7 Therefore shall Moab howl for Moab, every one shall howl: for the foundations of Kirhareseth shall ye mourn;e surely they are stricken.
8 For the fields of Heshbon languish, and the vine of Sibmah: the lords of the heathen have broken down the principal plants thereof, they are come even unto Jazer, they wandered through the wilderness: her branches are stretched out, they are gone over the sea.