Bible Verses About Supererogation

Therefore thou sonne of man, saye vnto the children of thy people, The righteousnesse of the righteous shall not deliuer him in the day of his transgression, nor the wickednesse of the wicked shall cause him to fall therein, in the day that he returneth from his wickednesse, neither shall the righteous liue for his righteousnesse in the day that he sinneth.

When I shall say vnto the righteous, that he shall surely liue, if he trust to his owne righteousnes, and commit iniquitie, all his righteousnes shall be no more remembred, but for his iniquitie that he hath committed, he shall die for the same.

So likewise yee, when yee haue done all those things, which are commanded you, say, We are vnprofitable seruants: wee haue done that which was our duetie to doe.