Luke 12:10
And every one who shall speak a word against the Son of man, it shall be forgiven him: but to him having blasphemed against the Holy Ghost, it shall not be forgiven.
Matthew 12:31-32
Therefore I say unto you, every sin and blasphemy shall be forgiven unto men; but the blasphemy of the Spirit shall not be forgiven unto men.
1 John 5:16
If any one may see his brother sinning a sin not unto death, he shall ask, and he will give him life to those sinning not unto death. There is a sin unto death; concerning this I do not say that you may ask.
1 Timothy 1:13
being antecedently a blasphemer, and a persecutor, and an insulter: but I obtained mercy, because I did it in unbelief being ignorant;
Mark 3:28-30
Truly I say unto you, that all sins shall be forgiven unto the sons of men, and blasphemies whatsoever they may blaspheme:
Luke 23:34
And Jesus said, Father, forgive them, for they know not what they are doing. And dividing His garments, they were casting the lots.
Hebrews 6:4-8
For it is impossible that those having been once enlightened, and tasted the heavenly gift, and have been made partakers of the Holy Ghost,
Hebrews 10:26-31
For we sinning willingly after we have received the perfect knowledge of the truth, there is left no more sacrifice for sins,