Isaiah 19:18-22

In that day there will be five cities in the land of Egypt that speak the language of Canaan and swear allegiance to the LORD of hosts. One of these will be called the City of Destruction. In that day there will be an altar to the LORD in the midst of the land of Egypt, and a pillar to the LORD at its border. It will be a sign and a witness to the LORD of hosts in the land of Egypt. When they cry to the LORD because of oppressors, he will send them a savior and defender, and deliver them. And the LORD will make himself known to the Egyptians, and the Egyptians will know the LORD in that day and worship with sacrifice and offering, and they will make vows to the LORD and perform them. And the LORD will strike Egypt, striking and healing, and they will return to the LORD, and he will listen to their pleas for mercy and heal them.