“I, even I, am the LORD, and apart from me there is no savior. I have revealed and saved and proclaimed— I, and not some foreign god among you. You are my witnesses,” declares the LORD, “that I am God.” Isaiah 43:11-12

Via Wikipedia
"Isaiah was the 8th-century BC Jewish prophet for whom the Book of Isaiah is named.
Within the text of the Book of Isaiah, Isaiah himself is referred to as "the prophet", but the exact relationship between the Book of Isaiah and any such historical Isaiah is complicated. The traditional view is that all 66 chapters of the book of Isaiah were written by one man, Isaiah, possibly in two periods between 740 BCE and c. 686 BCE, separated by approximately 15 years, and includes dramatic prophetic declarations of Cyrus the Great in the Bible, acting to restore the nation of Israel from Babylonian captivity. Another widely-held view is that parts of the first half of the book (chapters 1–39) originated with the historical prophet, interspersed with prose commentaries written in the time of King Josiah a hundred years later, and that the remainder of the book dates from immediately before and immediately after the end of the exile in Babylon, almost two centuries after the time of the historic prophet"
Via Wikipedia
"Chapters 40-55 are known as "Deutero-Isaiah" and date from the time of the Israelites' exile in Babylon. According to John Skinner, this chapter, which is "largely a recapitulation of certain outstanding themes of the prophecy", consists of "exhortations addressed to the exiles in the near prospect of deliverance""
Here, Isaiah talks of Israel's only saviour
"But now, this is what the Lord says—
he who created you, Jacob,
he who formed you, Israel:
“Do not fear, for I have redeemed you;
I have summoned you by name; you are mine.
When you pass through the waters,
I will be with you;
and when you pass through the rivers,
they will not sweep over you.
When you walk through the fire,
you will not be burned;
the flames will not set you ablaze.
For I am the Lord your God,
the Holy One of Israel, your Savior;
I give Egypt for your ransom,
Cush and Seba in your stead.
Since you are precious and honored in my sight,
and because I love you,
I will give people in exchange for you,
nations in exchange for your life.
Do not be afraid, for I am with you;
I will bring your children from the east
and gather you from the west.
I will say to the north, ‘Give them up!’
and to the south, ‘Do not hold them back.’
Bring my sons from afar
and my daughters from the ends of the earth—
everyone who is called by my name,
whom I created for my glory,
whom I formed and made.”
Lead out those who have eyes but are blind,
who have ears but are deaf.
All the nations gather together
and the peoples assemble.
Which of their gods foretold this
and proclaimed to us the former things?
Let them bring in their witnesses to prove they were right,
so that others may hear and say, “It is true.”
“You are my witnesses,” declares the Lord,
“and my servant whom I have chosen,
so that you may know and believe me
and understand that I am he.
Before me no god was formed,
nor will there be one after me.
I, even I, am the Lord,
and apart from me there is no savior.
I have revealed and saved and proclaimed—
I, and not some foreign god among you.
You are my witnesses,” declares the Lord, “that I am God.
Yes, and from ancient days I am he.
No one can deliver out of my hand.
When I act, who can reverse it?”"
AUAWN1009121
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