Bible Verses About Supererogation

Thou therefore, O son of man, say to the children of thy people: The justice of the just shall not deliver him, in what day soever he shall sin: and the wickedness of the wicked shall not hurt him, in what day soever he shall turn from his wickedness: and the just shall not be able to live in his justice, in what day soever he shall sin.

Yea, if I shall say to the just that he shall surely live, and he, trusting in his justice, commit iniquity: all his justices shall be forgotten, and his iniquity, which he hath committed, in the same shall he die.

I think not. So you also, when you shall have done all these things that are commanded you, say: We are unprofitable servants; we have done that which we ought to do.