What Do The Scriptures Say About God Being The Same ?
Hebrews 6:17-18 NKJV
Thus God, determining to show more abundantly to the heirs of promise the immutability of His counsel, confirmed it by an oath,  that by two immutable things, in which it is impossible for God to lie, we might have strong consolation, who have fled for refuge to lay hold of the hope set before us.
: unable to be changed
: not capable of or susceptible to change
Here are a few of many Scriptures, showing us that God does not change. God is Immutable, God is eternal, God is not stuck in time, therefore as His Word states clearly, God does not change.
Hebrews 13:8 ESV
Jesus Christ is the same yesterday and today and forever.
Malachi 3:6 ESV
“For I the Lord do not change; therefore you, O children of Jacob, are not consumed.
Revelation 1:8 ESV
“I am the Alpha and the Omega,” says the Lord God, “who is and who was and who is to come, the Almighty.”
Numbers 23:19 KJV
God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it ? or hath he spoken, and shall he not make it good?
Psalm 45:6 NKJV
Your throne, O God, is forever and ever; A scepter of righteousness is the scepter of Your kingdom.
James 1:17 ESV
Psalm 90:2 ESV
Before the mountains were brought forth, or ever you had formed the earth and the world, from everlasting to everlasting you are God.
Psalm 102:24-27 ESV
“O my God,” I say, “take me not away in the midst of my days— you whose years endure throughout all generations!” Of old you laid the foundation of the earth, and the heavens are the work of your hands. They will perish, but you will remain; they will all wear out like a garment. You will change them like a robe, and they will pass away, but you are the same, and your years have no end.
Isaiah 29:11-14 ESV
And the vision of all this has become to you like the words of a book that is sealed. When men give it to one who can read, saying, “Read this,” he says, “I cannot, for it is sealed.” And when they give the book to one who cannot read, saying, “Read this,” he says, “I cannot read.” And the Lord said: “Because this people draw near with their mouth and honor me with their lips, while their hearts are far from me, and their fear of me is a commandment taught by men, therefore, behold, I will again do wonderful things with this people, with wonder upon wonder; and the wisdom of their wise men shall perish, and the discernment of their discerning men shall be hidden.”
Revelation 1:6 ESV
And made us a kingdom, priests to his God and Father, to him be glory and dominion forever and ever. Amen.
Luke 1:46-55 ESV
And Mary said, “My soul magnifies the Lord, and my spirit rejoices in God my Savior, for he has looked on the humble estate of his servant. For behold, from now on all generations will call me blessed; for he who is mighty has done great things for me, and holy is his name. And his mercy is for those who fear him from generation to generation.
Psalm 89:34 ESV
I will not violate my covenant or alter the word that went forth from my lips.
Romans 6:23 ESV
For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
Romans 2:11 ESV
For God shows no partiality.
John 4:24 ESV
God is spirit, and those who worship him must worship in spirit and truth.”
Luke 16:15 ESV
And he said to them, “You are those who justify yourselves before men, but God knows your hearts. For what is exalted among men is an abomination in the sight of God.
Isaiah 14:24 ESV
The Lord of hosts has sworn: “As I have planned, so shall it be, and as I have purposed, so shall it stand,
Hebrews 1:10-12 NKJV
And: “You, LORD, in the beginning laid the foundation of the earth, And the heavens are the work of Your hands.  They will perish, but You remain; And they will all grow old like a garment;  Like a cloak You will fold them up, And they will be changed. But You are the same, And Your years will not fail.”
Matthew 24:14 KJV
And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come.