Commentaries:
Barnes' Notes
My covenant will I not break - literally, I will not pollute, defile, profane. See the notes at Psalms 89:31, where the same word is used. God says that he will not do in regard to the covenant as they had done.
Nor alter the thing ... - The promise which I have made. I will not make it a different thing. I will not modify its conditions, or withdraw it. It shall stand precisely as it was when I uttered it. What God promises will be exactly performed.
DISCLAIMER: Church of the Great God (CGG) provides these resources to aid the individual in studying the Bible. However, it is up to the individual to "prove all things, and hold fast to that which is good" (I Thessalonians 5:21). The content of these resources does not necessarily reflect the views of CGG. They are provided for information purposes only.