The LORD, your Redeemer, the Holy One of Israel says: “For your sake, I have sent to Babylon, and I will bring all of them down as fugitives, even the Chaldeans, in the ships of their rejoicing. I am the LORD, your Holy One, the Creator of Israel, your King.”
Traditional attribution
The book names Isaiah in 1:1. Many scholars date chapters 40 to 66 later.