Bible Verses About Supererogation

Therefore, son of man, say to your people: ‘The righteousness of the righteous man will not deliver him in the day of his transgression; neither will the wickedness of the wicked man cause him to stumble on the day he turns from his wickedness. Nor will the righteous man be able to survive by his righteousness on the day he sins.’

If I tell the righteous man that he will surely live, but he then trusts in his righteousness and commits iniquity, then none of his righteous works will be remembered; he will die because of the iniquity he has committed.

So you also, when you have done everything commanded of you, should say, ‘We are unworthy servants; we have only done our duty.’”