Isaiah 19:20 in the King James Version
And it shall be for a sign and for a witness unto the LORD of hosts in the land of Egypt: for they shall cry unto the LORD because of the oppressors, and he shall send them a saviour, and a great one, and he shall deliver them.
Context
19 In that day, there will be an altar to the LORD in the middle of the land of Egypt, and a pillar to the LORD at its border.
20 It will be for a sign and for a witness to the LORD of Armies in the land of Egypt; for they will cry to the LORD because of oppressors, and he will send them a savior and a defender, and he will deliver them.
21 The LORD will be known to Egypt, and the Egyptians will know the LORD in that day. Yes, they will worship with sacrifice and offering, and will vow a vow to the LORD, and will perform it.