Luke 12:10
"If any one shall speak a word against the Son of man it shall be forgiven him; but he who is blasphemes against the Holy Spirit shall not be forgiven.
Matthew 12:31-32
"Therefore I tell you that every sin and blasphemy shall be forgiven men; but the blasphemy against the Holy Spirit shall not be forgiven.
1 John 5:16
If any one sees his brother committing a sin that is not deadly, he shall ask, and God will give him life, for any one who is not committing a deadly sin. There is a deadly sin; concerning that I do not say that he should pray.
1 Timothy 1:13
although I had formerly been a blasphemer and a persecutor and a doer of outrage. But I obtained mercy because I acted ignorantly in unbelief.
Mark 3:28-30
In solemn truth I tell you that the sons of men shall be forgiven all their sins and all the blasphemies they may utter,
Luke 23:34
Jesus kept saying, "Father forgive them, for they do not know what they are doing." And they divided his garments among them, casting lots for them,
Hebrews 6:4-8
For in the case of those who have been once for all enlightened and have tasted of the heavenly gift,
Hebrews 10:26-31
For if we sin wilfully, after we have received the knowledge of the truth, there no longer remains any other sacrifice for sins,