1 John 5:16-18

16 If any man see his brother sin a sin which is not to death, he shall ask, and he shall give him life for them that sin not to death. There is a sin to death: I do not say that he shall pray for it.

17 All unrighteousness is sin: and there is a sin not to death.

18 We know that whoever is born of God sins not; but he that is begotten of God keeps himself, and that wicked one touches him not.