2 Kings 18:25
Am I now come up without the LORD against this place to destroy it? The LORD said to me, Go up against this land, and destroy it. Am I now come up without the LORD against this place to destroy it? The LORD said to me, Go up against this land, and destroy it.
The verse belongs to Sennacherib's invasion of Judah and siege of Jerusalem during the Assyrian campaign against the city. In the verse Rabshakeh claims that the Lord sent Assyria up against the land to destroy it. He uses that claim to frighten the people and to undermine their trust in Hezekiah and in God. The claim is false: God, not Assyria's king, determines Jerusalem's fate, and he miraculously delivers the city, demonstrating his power above the nations and their gods.
The story in chapters 18 and 19 shows that God is a friend to his people when they are in trouble and delivers those who trust him. Hezekiah spread the threatening letter before the Lord and prayed, showing that troubles may be spread before God in prayer. The faith and trust learned in this way prepares children to stand in the coming time of trouble.
The invasion described in the chapter is historically confirmed by the Assyrian king's cylinder, which also records it. When the angel killed 185,000 men, the Assyrian army was not near Jerusalem but was with the king of Assyria at Libnah. For that reason, the destruction of that army does not fulfill Isaiah 30:33.