8 Bible Verses about Unforgivable Sin

Therefore I say unto you, Every sin and blasphemy shall be forgiven unto men; but the blasphemy against the Spirit shall not be forgiven. And whosoever shall speak a word against the Son of man, it shall be forgiven him; but whosoever shall speak against the Holy Spirit, it shall not be forgiven him, neither in this world, nor in that which is to come.

Verily I say unto you, All their sins shall be forgiven unto the sons of men, and their blasphemies wherewith soever they shall blaspheme: but whosoever shall blaspheme against the Holy Spirit hath never forgiveness, but is guilty of an eternal sin:

And every one who shall speak a word against the Son of man, it shall be forgiven him: but unto him that blasphemeth against the Holy Spirit it shall not be forgiven.

For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more a sacrifice for sins, but a certain fearful expectation of judgment, and a fierceness of fire which shall devour the adversaries. A man that hath set at nought Moses law dieth without compassion on the word of two or three witnesses:read more.
of how much sorer punishment, think ye, shall he be judged worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant wherewith he was sanctified an unholy thing, and hath done despite unto the Spirit of grace?

because they said, He hath an unclean spirit.

But when the Pharisees heard it, they said, This man doth not cast out demons, but by Beelzebub the prince of the demons.

And the scribes that came down from Jerusalem said, He hath Beelzebub, and, By the prince of the demons casteth he out the demons.

But some of them said, By Beelzebub the prince of the demons casteth he out demons.