I the Lord do not change.

Isaiah 44:6 

“This is what the LORD says— Israel's King and Redeemer, the LORD Almighty: I am the first and I am the last; apart from me there is no God.

Isaiah 43:11-12 

11 I, even I, am the LORD, and apart from me there is no savior.

12  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 42:5-8 

5 This is what God the LORD says— he who created the heavens and stretched them out, who spread out the earth and all that comes out of it, who gives breath to its people, and life to those who walk on it:

6  “I, the LORD, have called you in righteousness; I will take hold of your hand. I will keep you and will make you to be a covenant for the people and a light for the Gentiles,

7  to open eyes that are blind, to free captives from prison and to release from the dungeon those who sit in darkness.

8  “I am the LORD; that is my name! I will not give my glory to another or my praise to idols.

Isaiah 41:13 

For I am the LORD, your God, who takes hold of your right hand and says to you, Do not fear; I will help you.

Isaiah 40:28-31 

28 Do you not know? Have you not heard? The LORD is the everlasting God, the Creator of the ends of the earth. He will not grow tired or weary, and his understanding no one can fathom.

29  He gives strength to the weary and increases the power of the weak.

30  Even youths grow tired and weary, and young men stumble and fall;

31  but those who hope in the LORD will renew their strength. They will soar on wings like eagles; they will run and not grow weary, they will walk and not be faint.