Luke 12:10
And every one who shall utter a word against the Son of man, it shall be forgiven him; but for him who hath blasphemed against the Holy Ghost, there shall be no forgiveness.
Matthew 12:31-32
Therefore I say unto you, All sin and blasphemy shall be forgiven to men; but the blasphemy against the Spirit shall not be forgiven to men.
1 John 5:16
If any person see his brother committing a sin not unto death, he shall request, and God will grant him life for those that sin not unto death. There is a sin unto death: I say not that he should request for that.
1 Timothy 1:13
who was before a blasphemer, and a persecutor, and insolently violent, But I was admitted to mercy, for I did it ignorantly in unbelief;
Mark 3:28-30
Verily I say unto you, That all sins shall be forgiven to the sons of men, and the blasphemies, whatsoever they may blaspheme:
Luke 23:34
And Jesus said, Father, forgive them; for they know not what they do. Then dividing his garments, they cast the lot.
Hebrews 6:4-8
For it is not possible to renew again unto repentance those who have been once illuminated, and have tasted the celestial gift, and have been made partakers of the Holy Ghost,
Hebrews 10:26-31
For if we sin wilfully after we have received the knowledge of the truth, no more sacrifice for sins remaineth;