1 John 5:16
New International Version (NIV)
16 If you see any brother or sister commit a sin that does not lead to death, you should pray and God will give them life. I refer to those whose sin does not lead to death. There is a sin that leads to death. I am not saying that you should pray about that.
From BibleGateway.com: http://www.biblegateway.com/passage/?search=1 John 5:16&version=NIV
NIV®