2 Timothy 2:13

if we are unfaithful, he remains faithful--{he cannot deny himself}.

Numbers 23:19

God [is] not a man, that he should lie, nor a son of humankind, that he should change his mind. Has he said, and will he not do [it]? And has he spoken, and will he not fulfill it

Romans 3:3

{What is the result} if some refused to believe? Their unbelief will not nullify the faithfulness of God, [will it]?

Titus 1:2

in the hope of eternal life which God, who does not lie, promised before eternal ages,

Isaiah 25:1

Yahweh, you [are] my God; I will exalt you. I will praise your name, for you have done wonderful things, plans {of old}, [in] faithfulness, trustworthiness.

Matthew 24:35

Heaven and earth will pass away, but my words will never pass away.

Romans 9:6

But [it is] not as if the word of God had failed. For not all those [who are descended] from Israel [are truly] Israel,

1 Corinthians 1:9

God [is] faithful, by whom you were called to fellowship with his Son Jesus Christ our Lord.

1 Thessalonians 5:24

The one who calls you [is] faithful, who also will do [this].

2 Thessalonians 3:3

But the Lord is faithful, who will strengthen you and guard [you] from the evil one.

Hebrews 6:18

in order that through two unchangeable things, in which [it is] impossible for God to lie, we who have taken refuge may have powerful encouragement to hold fast to 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
Yahweh, you [are] my God; I will exalt you. I will praise your name, for you have done wonderful things, plans {of old}, [in] faithfulness, trustworthiness.
Matthew 24:35
Heaven and earth will pass away, but my words will never pass away.
Romans 3:3
{What is the result} if some refused to believe? Their unbelief will not nullify the faithfulness of God, [will it]?
Romans 9:6
But [it is] not as if the word of God had failed. For not all those [who are descended] from Israel [are truly] Israel,
1 Thessalonians 5:24
The one who calls you [is] faithful, who also will do [this].
2 Thessalonians 3:3
But the Lord is faithful, who will strengthen you and guard [you] from the evil one.

He cannot

Numbers 23:19
God [is] not a man, that he should lie, nor a son of humankind, that he should change his mind. Has he said, and will he not do [it]? And has he spoken, and will he not fulfill it
Titus 1:2
in the hope of eternal life which God, who does not lie, promised before eternal ages,
Hebrews 6:18
in order that through two unchangeable things, in which [it is] impossible for God to lie, we who have taken refuge may have powerful encouragement to hold fast to the hope set before [us],

General references

Jeremiah 36:28
"{Take again} for yourself another scroll and write on it all the former words that were in the first scroll which Jehoiakim, the king of Judah, has burned.