Isaiah 27:12-13

12In that day the Lord will thresh [out His grain] from the flowing stream of the River [Euphrates] to the Brook of Egypt, and you will be gathered up one by one, O sons of Israel.

13It will come to pass in that day that a great trumpet will be blown, and those who were lost and perishing in the land of Assyria and who were scattered in the land of Egypt will come and worship the Lord on the holy mountain at Jerusalem.