1 John 5:15-17

Young's Literal Translation

¹⁵ and if we have known that He doth hear us, whatever we may ask, we have known that we have the requests that we have requested from Him.

¹⁶ If any one may see his brother sinning a sin not unto death, he shall ask, and He shall give to him life to those sinning not unto death; there is sin to death, not concerning it do I speak that he may beseech;

¹⁷ all unrighteousness is sin, and there is sin not unto death.