8 Bible Verses about Unforgivable Sin

Wherefore I say to you, All manner of sin and blasphemy shall be forgiven to men; but the blasphemy of the Holy Ghost shall not be forgiven to men. And whosoever speaketh against the Son of man, it shall be forgiven him: but whosoever speaketh against the Holy Ghost, it shall not be forgiven him, neither in this world, nor in that to come.

Verily I say to you, All sins shall be forgiven the sons of men and blasphemies wherewith soever they shall blaspheme. But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is liable to eternal damnation:

And whosoever shall speak against the Son of man, it shall be forgiven him: but to him that blasphemeth against the Holy Ghost, it shall not be forgiven.

For when we sin wilfully after receiving the knowledge of the truth, there remaineth no more sacrifice for sins, But a certain fearful looking for of judgment and fiery indignation, which will devour the adversaries. He that despised the law of Moses died without mercy, under two or three witnesses.read more.
Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and counted the blood of the covenant, by which he hath been sanctified, an unholy thing, and done despite to the spirit of grace?

Because they said, He hath an unclean spirit.

But the Pharisees hearing it said, This fellow casteth not out devils but by Beelzebub the prince of the devils.

But the scribes who had come down from Jerusalem said, He hath Beelzebub, and by the prince of the devils casteth he out devils.

But some of them said, He casteth out devils by Beelzebub the prince of the devils: