SUPEREROGATION
supererogation
(noun) an effort above and beyond the call of duty
Source: WordNet® 3.1
Etymology
Noun
supererogation (countable and uncountable, plural supererogations)
An act of doing more than is required.
(philosophy) An action that is neither morally forbidden nor required, but has moral value.
Source: Wiktionary
Su`per*er`o*ga"tion, n. Etym: [L. supererogatio a payment in
addition.]
Definition: The act of supererogating; performance of more than duty or
necessity requires. Works of supererogation (R. C. Ch.), those good
deeds believed to have been performed by saints, or capable of being
performed by men, over and above what is required for their own
salvation.
Source: Webster’s Unabridged Dictionary 1913 Edition