I gave Egypt for thy ransom: this was fulfilled either,
1. When God smote the Egyptians, both first-born and others, in Egypt, and drowned Pharaoh and his host in the Red Sea, for the safety and benefit of his people; or,
2. When the king of Assyria, either Sennacherib, as many think, or rather Esar-haddon, who designed to revenge his father's disgrace and loss before Jerusalem upon the Jews, but was diverted and directed by God to employ his forces against Egypt, and Ethiopia, and Seba, as it follows. See Poole on "Isaiah 20:1", &c. Ethiopia and Seba; the Sabeans, who were confederate with the Ethiopians or Cushites.