Matthew 24:35

The heavens and the earth will pass away, but my words shall never pass away.

Hebrews 6:18-20

For he intended us to find great encouragement in these two unchangeable things, which make it impossible for God to prove false--we, I mean, who fled for safety where we might lay hold on the hope set before us.

Treasury of Scripture Knowledge

Summary

Thy mercy, O LORD, is in the heavens; and thy faithfulness reacheth unto the clouds.

Bible References

Faithfulness

Matthew 24:35
The heavens and the earth will pass away, but my words shall never pass away.
Hebrews 6:18
For he intended us to find great encouragement in these two unchangeable things, which make it impossible for God to prove false--we, I mean, who fled for safety where we might lay hold on the hope set before us.