1 John 5:14-17

14And this is the boldness which we have toward him, that, if we ask anything according to his will, he heareth us: 15and if we know that he heareth us whatsoever we ask, we know that we have the petitions which we have asked of him. 16If any man see his brother sinning a sin not unto death, he shall ask, and God will give him life for them that sin not unto death. There is a sin unto death: not concerning this do I say that he should make request. 17All unrighteousness is sin: and there is a sin not unto death.