2 Timothy 2:13

he will renounce us likewise: tho' we are diffident, he is still faithful, and will not retract his word.

Romans 3:3

for what if some betrayed their trust? shall their unfaithfulness render

Titus 1:2

and gives the expectation of eternal life, which the God of veracity promised so many ages ago;

Matthew 24:35

heaven and earth may fail, but my words shall never fail.

Romans 9:6

However, the divine promise cannot but have its effect. for they are not the whole of Israel, who are descended from Israel:

1 Corinthians 1:9

for he, who has called you to the communication of his son Jesus Christ our Lord, will make good his promise.

1 Thessalonians 5:24

he that has called you, is faithful, and this he will effect.

2 Thessalonians 3:3

but as for you, the Lord, who is faithful, will establish you, and protect you from the malicious one.

Hebrews 6:18

that by two immutable things in which it was impossible for God to deceive us, we, who have no other refuge to fly to, but to maintain our present hopes,

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 may fail, but my words shall never fail.
Romans 3:3
for what if some betrayed their trust? shall their unfaithfulness render
Romans 9:6
However, the divine promise cannot but have its effect. for they are not the whole of Israel, who are descended from Israel:
1 Thessalonians 5:24
he that has called you, is faithful, and this he will effect.
2 Thessalonians 3:3
but as for you, the Lord, who is faithful, will establish you, and protect you from the malicious one.

He cannot

Titus 1:2
and gives the expectation of eternal life, which the God of veracity promised so many ages ago;
Hebrews 6:18
that by two immutable things in which it was impossible for God to deceive us, we, who have no other refuge to fly to, but to maintain our present hopes,