Isaiah 19:17-21
English Standard Version
19In 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.
20It 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.
21And 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.