Matthew 24:35

The heaven and the earth will pass away, but My words shall not pass away.

Luke 1:50

And His mercy is unto generations and generations to those who fear Him.

Ephesians 1:6-7

to the praise of the glory of His grace, which He graciously bestowed on us in the Beloved;

Hebrews 6:18

that, through two immutable facts, in which it is impossible that God should lie, we may have strong encouragement, who fled for refuge to lay hold of 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
The heaven and the earth will pass away, but My words shall not pass away.
Hebrews 6:18
that, through two immutable facts, in which it is impossible that God should lie, we may have strong encouragement, who fled for refuge to lay hold of the hope set before us;