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.

It will be a sign and a witness to the LORD of Hosts in the land of Egypt. When they cry out to the LORD because of their oppressors, He will send them a savior and defender to rescue them.