Bible Verses About Supererogation

"Next, you, human being, say to your people: 'The righteousness of the righteous person will not save him, once he starts committing crimes; and likewise, the wickedness of the wicked person will not cause him to fall, once he turns from his wickedness. No, the righteous person cannot live by virtue of [his former righteousness], once he starts sinning.

So if, after I tell the righteous person that he will surely live, he begins trusting in his own [former] righteousness and starts committing crimes; then none of his [former] righteous actions will be remembered; on the contrary, he will die for the evil deeds he has committed.

It’s the same with you — when you have done everything you were told to do, you should be saying, ‘We’re just ordinary slaves, we have only done our duty.’”