Luke 12:10
And whosoever shall speak against the Son of man, it shall be forgiven him: but to him that blasphemeth against the Holy Ghost, it shall not be forgiven.
Matthew 12:31-32
Wherefore I say to you, All manner of sin and blasphemy shall be forgiven to men; but the blasphemy of the Holy Ghost shall not be forgiven to men.
1 John 5:16
If any one see his brother sin a sin which is not unto death, let him ask, and he will give him life for them that sin not unto death.
1 Timothy 1:13
having put me into the ministry, Who was before a blasphemer, and a persecuter, and a reviler; but I obtained mercy, because I did it ignorantly in unbelief.
Mark 3:28-30
Verily I say to you, All sins shall be forgiven the sons of men and blasphemies wherewith soever they shall blaspheme.
Luke 23:34
Then said Jesus, Father, forgive them; for they know not what they do. And they parted his raiment and cast lots.
Hebrews 6:4-8
For it is impossible for those who were once inlightened, and have tasted the heavenly gift, and been made partakers of the Holy Ghost,
Hebrews 10:26-31
For when we sin wilfully after receiving the knowledge of the truth, there remaineth no more sacrifice for sins,