2 Timothy 2:13

if we are unbelieving, he abideth faithful; he cannot contradict himself.

Romans 3:3

For what if some were unbelievers? shall their unbelief render the faithfulness of God ineffectual?

Titus 1:2

in hope of life eternal, which God, who cannot lie, hath promised before time had a being;

Matthew 24:35

Heaven and earth shall pass away, but my words shall in no wise pass away.

Romans 9:6

Now it is not supposable that the word of God hath failed. For these are not all Israel, who are of Israel:

1 Corinthians 1:9

Faithful is God, by whom ye have been called into communion with his Son Jesus Christ our Lord.

1 Thessalonians 5:24

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

2 Thessalonians 3:3

But the Lord is faithful, who will stablish you, and keep you from the wicked one.

Hebrews 6:18

that by two immutable things, in which it was impossible for God to lie, we might have strong consolation, who have fled for refuge to lay hold on the hope set before us;

Treasury of Scripture Knowledge

Summary

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

Bible References

Yet

Matthew 24:35
Heaven and earth shall pass away, but my words shall in no wise pass away.
Romans 3:3
For what if some were unbelievers? shall their unbelief render the faithfulness of God ineffectual?
Romans 9:6
Now it is not supposable that the word of God hath failed. For these are not all Israel, who are of Israel:
1 Thessalonians 5:24
Faithful is he that calleth you, who also will do it.
2 Thessalonians 3:3
But the Lord is faithful, who will stablish you, and keep you from the wicked one.

He cannot

Titus 1:2
in hope of life eternal, which God, who cannot lie, hath promised before time had a being;
Hebrews 6:18
that by two immutable things, in which it was impossible for God to lie, we might have strong consolation, who have fled for refuge to lay hold on the hope set before us;