Isaiah 19:20-22

20and it shall be for a sign and for a witness to Jehovah of hosts in the land of Egypt; for they shall cry unto Jehovah because of the oppressors, and he will send them a saviour and defender, who shall deliver them.

21And Jehovah shall be known to the Egyptians, and the Egyptians shall know Jehovah in that day, and shall serve with sacrifice and oblation; and they shall vow a vow unto Jehovah, and perform it.

22And Jehovah will smite Egypt; he will smite and heal: and they shall return to Jehovah, and he will be entreated of them, and will heal them.