1 John 5:16
If any man see his brother commit a sin, which is not a mortal sin, let him pray to God, who will grant him life, for such as do not commit a mortal sin. there is a sin unto death: in which case I do not enjoin any prayer to be made.
Hebrews 6:4-6
For it is impossible for those who were once enlightned, and have received the heavenly gifts, communicated by the holy spirit,
Matthew 12:31-32
wherefore I declare to you, all manner of sin and blasphemy shall be forgiven men; but blaspheming the holy Spirit
Luke 12:10
and whoever shall cast a reflection upon the son of man, it shall be forgiven him; but as for him, that shall blaspheme the holy spirit, it shall not be forgiven.
Mark 3:28-30
I declare unto you, all the sins which men may commit, and whatsoever blasphemies they may utter, may be forgiven them.
John 17:9
"It is for them I pray: I pray not for the world, but for them which thou hast given me, because they are thine.
2 Timothy 4:14
Alexander the copper-smith did me many injuries: the Lord may reward him according to his actions.
Hebrews 10:26-31
for if we wilfully apostatize, after having received the knowledge of the truth, it is as a sin for which there is no sacrifice appointed.
James 5:14-15
Is any of you sick? let him send for the pastors of the church, to pray for him, and after giving him the unction, in the name of the Lord,
2 Peter 2:20-22
As for those who have renounc'd the pollutions of the world, by their owning Jesus Christ for their Lord and saviour, if they are prevail'd upon to be entangled therein again, their last state is worse than the first.