Bible Verses About Supererogation

And thou, son of man, say unto the children of thy people, The righteousness of the righteous shall not deliver him in the day of his transgression; and as for the wickedness of the wicked, he shall not fall thereby in the day that he turneth from his wickedness; neither shall he that is righteous be able to live thereby in the day that he sinneth.

When I say to the righteous, that he shall surely live; if he trust to his righteousness, and commit iniquity, none of his righteous deeds shall be remembered; but in his iniquity that he hath committed, therein shall he die.

Even so ye also, when ye shall have done all the things that are commanded you, say, We are unprofitable servants; we have done that which it was our duty to do.