The multitude, etc… This and all that follows to the end of the chapter, relates to the Assyrian army under Sennacherib.
17:13. Nations shall make a noise like the noise of waters overflowing, but he shall rebuke him, and he shall flee far off: and he shall be carried away as the dust of the mountains before the wind, and as a whirlwind before a tempest.
17:14. In the time of the evening, behold there shall be trouble: the morning shall come, and he shall not be: this is the portion of them that have wasted us, and the lot of them that spoiled us.
Isaias Chapter 18
A woe to the Ethiopians, who fed Israel with vain hopes, their future conversion.
18:1. Woe to the land, the winged cymbal, which is beyond the rivers of Ethiopia,
18:2. That sendeth ambassadors by the sea, and in vessels of bulrushes upon the waters. Go, ye swift angels, to a nation rent and torn in pieces: to a terrible people, after which there is no other: to a nation expecting and trodden underfoot, whose land the rivers have spoiled.
Angels… Or messengers.
18:3. All ye inhabitants of the world, who dwell on the earth, when the sign shall be lifted up on the mountains, you shall see, and you shall hear the sound of the trumpet.
18:4. For thus saith the Lord to me: I will take my rest, and consider in my place, as the noon light is clear, and as a cloud of dew in the day of harvest.