2 Timothy 2:13

if we are faithless, he abideth faithful; for he cannot deny himself.

Numbers 23:19

God is not a man, that he should lie, Neither the son of man, that he should repent: Hath he said, and will he not do it? Or hath he spoken, and will he not make it good?

Romans 3:3

For what if some were without faith? shall their want of faith make of none effect the faithfulness of God?

Titus 1:2

in hope of eternal life, which God, who cannot lie, promised before times eternal;

Isaiah 25:1

O Jehovah, thou art my God; I will exalt thee, I will praise thy name; for thou hast done wonderful things, even counsels of old, in faithfulness and truth.

Matthew 24:35

Heaven and earth shall pass away, but my words shall not pass away.

Romans 9:6

But it is not as though the word of God hath come to nought. For they are not all Israel, that are of Israel:

1 Corinthians 1:9

God is faithful, through whom ye were called into the fellowship of his Son Jesus Christ our Lord.

1 Thessalonians 5:24

Faithful is he that calleth you, who will also do it.

2 Thessalonians 3:3

But the Lord is faithful, who shall establish you, and guard you from the evil one .

Hebrews 6:18

that by two immutable things, in which it is impossible for God to lie, we may have a strong encouragement, who have fled for refuge to lay hold of the hope set before us:

Treasury of Scripture Knowledge

Summary

If we believe not, yet he abideth faithful: he cannot deny himself.

General references

Bible References

Yet

Isaiah 25:1
O Jehovah, thou art my God; I will exalt thee, I will praise thy name; for thou hast done wonderful things, even counsels of old, in faithfulness and truth.
Matthew 24:35
Heaven and earth shall pass away, but my words shall not pass away.
Romans 3:3
For what if some were without faith? shall their want of faith make of none effect the faithfulness of God?
Romans 9:6
But it is not as though the word of God hath come to nought. For they are not all Israel, that are of Israel:
1 Thessalonians 5:24
Faithful is he that calleth you, who will also do it.
2 Thessalonians 3:3
But the Lord is faithful, who shall establish you, and guard you from the evil one .

He cannot

Numbers 23:19
God is not a man, that he should lie, Neither the son of man, that he should repent: Hath he said, and will he not do it? Or hath he spoken, and will he not make it good?
Titus 1:2
in hope of eternal life, which God, who cannot lie, promised before times eternal;
Hebrews 6:18
that by two immutable things, in which it is impossible for God to lie, we may have a strong encouragement, who have fled for refuge to lay hold of the hope set before us:

General references

Jeremiah 36:28
Take thee again another roll, and write in it all the former words that were in the first roll, which Jehoiakim the king of Judah hath burned.

American Standard Version Public Domain