Isaiah 14:24

I will not repent of this threatening, as I did of that against Nineveh, Jonah 3:4,10. And this solemn oath is added to confirm the faith of God's people, because otherwise the destruction of this vast and mighty empire might seem incredible. But it is to be diligently observed, that this verse doth not only concern this present prophecy of Babylon's destruction by the Medes and Persians, but is also to be extended unto the foregoing prophecy concerning the overthrow of Sennacherib and the Assyrian host, Isa 10, as appears by the next verse, where the sum of that prophecy is repeated. Nor is this any digression, but very pertinent to the main design and business of this chapter; inasmuch as the overthrow of that great Assyrian host, and of the deliverance of God's people at that time, was a pledge of the certain accomplishment of that future destruction of the city and empire of Babylon, and of their deliverance out of that captivity.