1 John 5:16-18

Godbey(i) 16 If any one may see his brother sinning a sin not unto death, he shall ask, and he will give him life to those sinning not unto death. There is a sin unto death; concerning this I do not say that you may ask. 17 All unrighteousness is sin: and there is sin not unto death. 18 We know that every one who has been born of God, sins not; but the one having been born of God keeps himself, and the evil one does not touch him.