Isaiah 19:19-22

19In that day shall there be an altar to Yhwh in the midst of the land of Egypt, and a pillar at the border thereof to Yhwh.

20And it shall be for a sign and for a witness unto Yhwh of Armies in the land of Egypt: for they shall cry unto Yhwh because of the oppressors, and he shall send them a saviour, and a great one, and he shall deliver them.

21And Yhwh shall be known to Egypt, and the Egyptians shall know Yhwh in that day, and shall do sacrifice and oblation; yea, they shall vow a vow unto Yhwh, and perform it.

22And Yhwh shall smite Egypt: he shall smite and heal it: and they shall return even to Yhwh, and he shall be intreated of them, and shall heal them.