2 Timothy 2:13

if we are unfaithful, he remains faithful: he can not deny himself.

Romans 3:3

What, indeed, if some have been unfaithful? Will their unfaithfulness overthrow the faithfulness of God?

Titus 1:2

in hope of eternal life, which God, who can not lie, promised be fore the times of the ages,

Matthew 24:35

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

Romans 9:6

It is not possible that the word of God has failed; for they are not all Israel who are of Israel.

1 Corinthians 1:9

God is faithful, by whom you have been called into the fellowship of his Son Jesus Christ our Lord.

1 Thessalonians 5:24

Faithful is he that calls you; and he will do what he has promised.

2 Thessalonians 3:3

But the Lord is faithful, and he will strengthen you, and keep you from the evil 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 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 not pass away.
Romans 3:3
What, indeed, if some have been unfaithful? Will their unfaithfulness overthrow the faithfulness of God?
Romans 9:6
It is not possible that the word of God has failed; for they are not all Israel who are of Israel.
1 Thessalonians 5:24
Faithful is he that calls you; and he will do what he has promised.
2 Thessalonians 3:3
But the Lord is faithful, and he will strengthen you, and keep you from the evil one.

He cannot

Titus 1:2
in hope of eternal life, which God, who can not lie, promised be fore the times of the ages,
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 to lay hold on the hope set before us;