In Isaiah 28:21, the Lord rises to do his strange work of judgment — explains the source of the terror in verse 19.

Isaiah 10:5 reveals the Assyrian as God's rod of anger — the same overflowing scourge that passes through here.

Isaiah 10:6 continues the Assyrian's commission to tread down God's people — exactly the judgment described here as the overflowing scourge.

Isaiah 33:7 describes the distress of envoys during the Assyrian crisis — the same terror prophesied here.

Isaiah 36:22 shows officials tearing their clothes in response to the Assyrian threat — the very terror prophesied here.

2 Kings 18:13 records Sennacherib's invasion of Judah — the terror and message prophesied here are fulfilled in that historical event.