Matthew 24:35

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

Romans 11:29

For the gifts and calling of God are without repentance.

James 1:17

and every perfect gift, but no evil one, is from above, and cometh down from the Father of lights, with whom there is no variation, nor shadow of turning:

Treasury of Scripture Knowledge

Summary

My covenant will I not break, nor alter the thing that is gone out of my lips.

Bible References

Nor

Matthew 24:35
Heaven and earth shall pass away, but my words shall not pass away.
Romans 11:29
For the gifts and calling of God are without repentance.
James 1:17
and every perfect gift, but no evil one, is from above, and cometh down from the Father of lights, with whom there is no variation, nor shadow of turning: