John Calvin Commentary Isaiah 47:4

"Our Redeemer, Jehovah of hosts is his name, the Holy One of Israel." — Isaiah 47:4 (ASV)

Our Redeemer. The Prophet shows for what purpose the Lord will inflict punishment on the Babylonians; that is, for the salvation of his people, as he had formerly declared (Isaiah 45:4). But this statement is much more forcible, because he speaks in what may be called an abrupt manner, and like a person awakened out of sleep, when he sees Babylon ruined, which formerly was accustomed to subdue other nations and trample them under her feet; and he shows that this happens for no other reason than that the Lord shows himself to be the “Redeemer” and defender of his people.

The Holy One of Israel. As if he had said, that not in vain he has chosen this people, and separated it from other nations. In this transaction he intended to give a display of his power, and on that account added to the title descriptive of his power, Jehovah of Hosts, the designation “Holy.”