What does Isaiah 10:26 mean?
God is telling His people not to be afraid of the Assyrians (Isaiah 10:24). This is despite the invading nation's destruction of Israel and Judah. The Lord has promised that His anger toward His people will end in a "very little while (Isaiah 10:25)." Then He will focus His anger on the Assyrians for the arrogance of their king (Isaiah 10:12).The Lord now promises to use His supernatural power against Assyria. He compares it to the time when He struck Midian at the rock of Oreb (Judges 7:25). This is a reference to the story of Gideon in Judges 7. At that time, it was the Midianites who were oppressing Israel. The Lord broke their oppression and sent the Midianites fleeing for their lives. One of the Midianite leaders, Oreb, was killed at a place that became known as a the "rock of Oreb" (Judges 7:19–26).
Isaiah also quotes The Lord, reminding the people of their deliverance from Egypt. That was when God told Moses to stretch out his hand over the sea so that the waters would come crashing back down on the Egyptians as they pursued the Israelites. Moses did so, and not one of the host of Pharaoh survived (Exodus 14:15–31). His defeat of the Assyrian king will be like the fate of the Pharaoh.
God wanted His people to remember that He had been willing and able to save them from oppressors in the past. He could and would do so again. The Lord kept this promise in 701 BC, when the angel of the Lord killed 185,000 Assyrians in one night when they were holding Jerusalem in siege (2 Kings 19:35).