Numbers 23:19

God is not a man, to say what is false; or the son of man, that his purpose may be changed: what he has said, will he not do? and will he not give effect to the words of his mouth

1 Samuel 15:29

And further, the Glory of Israel will not say what is false, and his purpose may not be changed: for he is not a man, whose purpose may be changed.

Malachi 3:6

For I am the Lord, I am unchanged; and so you, O sons of Jacob, have not been cut off.

James 1:17

Every good and true thing is given to us from heaven, coming from the Father of lights, with whom there is no change or any shade made by turning.

Titus 1:2

In the hope of eternal life, which was made certain before eternal time, by the word of God who is ever true;

Romans 11:29

Because God's selection and his mercies may not be changed.

Hebrews 6:18

So that we, who have gone in flight from danger to the hope which has been put before us, may have a strong comfort in two unchanging things, in which it is not possible for God to be false;

1 Chronicles 17:17

And this was only a small thing to you, O God; but your words have even been about the far-off future of your servant's family, looking on me as on one of high position, O Lord God.

Psalm 89:35

I have made an oath once by my holy name, that I will not be false to David.

Hosea 11:9

I will not put into effect the heat of my wrath; I will not again send destruction on Ephraim; for I am God and not man, the Holy One among you; I will not put an end to you.

Micah 7:20

You will make clear your good faith to Jacob and your mercy to Abraham, as you gave your oath to our fathers from times long past.

Habakkuk 2:3

For the vision is still for the fixed time, and it is moving quickly to the end, and it will not be false: even if it is slow in coming, go on waiting for it; because it will certainly come, it will not be kept back.

Luke 21:33

Heaven and earth will come to an end, but my words will not come to an end.

Treasury of Scripture Knowledge

Summary

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?

Bible References

Or hath he

1 Chronicles 17:17
And this was only a small thing to you, O God; but your words have even been about the far-off future of your servant's family, looking on me as on one of high position, O Lord God.
Micah 7:20
You will make clear your good faith to Jacob and your mercy to Abraham, as you gave your oath to our fathers from times long past.

General references

Joshua 21:45
The Lord kept faith with the house of Israel about all the good which he said he would do for them, and all his words came true.
Daniel 4:28
All this came to King Nebuchadnezzar.
Luke 1:57
Now it was time for Elisabeth to give birth, and she had a son.
Acts 15:18
Says the Lord, who has made these things clear from the earliest times.
Romans 11:29
Because God's selection and his mercies may not be changed.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain