Part of the ongoing Verse Quick Reference project.

Psa 15:4  in whose eyes a vile person is despised, but who honors those who fear the LORD; who swears to his own hurt and does not change; 

Psalms 15:4 is in the context of a Psalm speaking of the traits of a righteous man. He does what is right (v2). He does no evil to his neighbor (v3). He does not lend money at interest (v5). He does not take bribes (v5). In this context, David also says that the man “does not change”.

If this verse was about God, it would certainly be used in the same way that Malachi 3:6 is used. It would be used to support the metaphysical claim that God cannot change in any respect. But this verse, like Malachi 3:6, is instead a character statement. If the righteous continue to be righteous, they do not change.