'Unchangeable' in the Bible

But He is unchangeable; who can oppose Him?He does what He desires.

For I have said, “Goodness and lovingkindness will be built up forever;In the heavens [unchangeable and majestic] You will establish Your faithfulness.”

Because God wanted to show His unchangeable purpose even more clearly to the heirs of the promise, He guaranteed it with an oath,

so that through two unchangeable things, in which it is impossible for God to lie, we who have fled for refuge might have strong encouragement to seize the hope set before us.

But this man, because he continueth ever, hath an unchangeable priesthood.