They will all be left to the mountain birds of prey, and to the beasts of the land. The birds will feed on them in summer, and all the wild animals in winter.
6. They shall be left together. {Bogus footnote} He means that they will be cast aside as a thing of no value, as John the Baptist also compares them to chaff, which is thrown on the dunghill. (Matthew 3:12; Luke 3:17.) Thus Isaiah shews that they will be exposed to the wild beasts and to the fowls, so that the fowls will nestle in them...
Interpreters are very much at a loss where to find this land that lies beyond the rivers of Cush. Some take it to be Egypt, a maritime country, and full of rivers, and which courted Israel to depend upon them, but proved broken reeds; but against this it is strongly objected that the next chapter is distinguished from this by the title of the burden of Egypt.
Commenting on Isaiah 18:1-7
They shall be left, together unto the fowls of the mountains, and to the beasts of the earth,.... That is, both sprigs and branches; with the fruit of them, which being unripe, are disregarded by men, but fed upon by birds and beasts; the fruits by the former, and the tender sprigs and green branches by the latter; signifying the destruction of the Ethiopians or...