Isaiah 19:17-21

The land of Judah will become a cause of shame to Egypt; everyone to whom it is mentioned will be in great fear because of the plan of the Lord of armies which He is making against them.

On that day five cities in the land of Egypt will be speaking the language of Canaan and swearing allegiance to the Lord of armies; one will be called the City of Destruction.

On that day there will be an altar to the Lord in the midst of the land of Egypt, and a memorial stone to the Lord beside its border.

And it will become a sign and a witness to the Lord of armies in the land of Egypt; for they will cry out to the Lord because of oppressors, and He will send them a Savior and a Champion, and He will save them.

So the Lord will make Himself known to Egypt, and the Egyptians will know the Lord on that day. They will even worship with sacrifice and offering, and will make a vow to the Lord and perform it.