8 Bible Verses about The Unpardonable Sin

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. And whosoever may speak a word against the Son of man, it shall be forgiven him: but whosoever shall speak against the Holy Ghost, it shall not be forgiven him, neither in this world, nor in the world to come.

but whosoever shall blaspheme against the Holy Ghost, hath no forgiveness to eternity, but is adjudged to everlasting damnation.

But Peter said, O Ananias! why hath Satan filled thy heart that thou shouldst lie to the Holy Ghost, and secrete something from the price of the estate?

Ye stiff-necked and uncircumcised in heart and in ears, ye do always oppose yourselves against the Holy Ghost: as your fathers, so are ye.

And grieve not the holy Spirit of God, whereby ye have been sealed unto the day of redemption.

Quench not the Spirit.

by how much, think ye, shall he be counted worthy of more condign punishment who hath trampled on the Son of God, and regarded the blood of his testament, by which he was sanctified, as an unclean thing, and hath treated the gracious Spirit contumeliously?

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.