Matthew 24:35

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

Luke 1:50

and his name is holy, and his mercy is on them that fear Him, unto all generations.

Ephesians 1:6-7

to the praise of his glorious grace, whereby He hath made us acceptable in the Beloved:

Hebrews 6:18

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

Treasury of Scripture Knowledge

Summary

For I have said, Mercy shall be built up for ever: thy faithfulness shalt thou establish in the very heavens.

Faithfulness ps 89

Bible References

Faithfulness ps 89

Matthew 24:35
Heaven and earth shall pass away, but my words shall not pass away.
Hebrews 6:18
that by two immutable things, in which it is impossible for God to fail, we might have strong consolation, who have fled for refuge to lay hold on the hope set before us;