Isaiah 43:3

“For I am the Lord thy God, the Holy One of Israel, thy Saviour, &c.] The Lord is the covenant God of his people, holy in himself, and the sanctifier of them, and their Saviour in time of trouble; and therefore need no doubt of his presence and support amidst all their afflictions; and besides they should call to mind past experiences of his goodness, to encourage their faith in him, as to present help and assistance: I gave Egypt for thy ransom; he sacrificed the Egyptians instead of the Israelites; he destroyed the firstborn of Egypt, and saved Israel his firstborn; he drowned the Egyptians in the Red sea, when the Israelites passed safely through it; and the destruction of the former was…”

“Egypt for thy ransom--Either Egypt or Israel must perish; God chose that Egypt, though so much more mighty, should be destroyed, in order that His people might be delivered; thus Egypt stood, instead of Israel, as a kind of "ransom." The Hebrew, kopher, means properly "that with which anything is overlaid," as the pitch with which the ark was overlaid; hence that which covers over sins, an atonement. Nebuchadnezzar had subdued Egypt, Ethiopia (Hebrew, Cush), and Saba (descended from Cush, Gen 10:7, probably Meroe of Ethiopia, a great island formed by the Astaboras and the Nile, conquered by Cambyses, successor of Cyrus). Cyrus received these from God with the rest of the Babylonian…”

“For I am the Lord thy God - This verse continues the statement of the reasons why he would protect them. He was Yahweh their God. He was not only the true God, but he was the God who had entered into solemn covenant with them, and who would therefore protect and defend them. The Holy One of Israel - It was one of his characteristics that he was the God of Israel. Other nations worshipped other gods. He was the God of Israel; and as it was presumed that a god would protect his own people, so he bound himself to deliver them. Thy Saviour - This was another characteristic. He had saved them in days of peril; and he had assumed toward them the relation of a Saviour; and he would maintain that…”

“I gave Egypt - This was fulfilled when the king of Assyria, Esar - haddon, who designed to revenge his father's disgrace, upon the Jews, was diverted and directed by God to employ his forces against Egypt, and Ethiopia, and Seba. Seba - The Sabaeans were confederate with the Ethiopians. Isaiah 43:4”

“the Holy One: Isa 30:11, Isa 41:14, Isa 45:15, Isa 45:21, Isa 49:26, Isa 60:16; Hos 13:4; Tit 2:10-14; Tit 3:4-6; Jde 1:25 I gave: Exo 10:7; Ch2 14:9-14; Pro 11:8, Pro 21:18 Isaiah 43:4”

“Just as in Isa 43:1, kı̄ (for), with all that follows, assigns the reason for the encouraging "Fear not;" so here a second kı̄ introduces the reason for the promise which ensures them against the dangers arising from either water or fire. "For I Jehovah am thy God; (I) the Holy One of Israel, thy Saviour: I give up Egypt as a ransom for thee, Ethiopia and Seba in thy stead. Because thou art dear in my eyes, highly esteemed, and I loved thee; I give up men in thy stead, and peoples for thy life." Both "Jehovah" and "the Holy One of Israel" are in apposition to "I" ('ănı̄), the force of which is continued in the second clause. The preterite nâthattı̄ (I have given), as the words "I will…”