Mark 3:29

but whoever slanders the Holy Spirit remains unforgiven to the end; he has to answer for an enduring sin."

Matthew 25:46

And these last will go away 'into aeonian punishment,' but the righteous 'into aeonian life.'"

Mark 12:40

They are the men that rob widows of their homes, and make a pretense of saying long prayers. Their sentence will be all the heavier."

Luke 12:10

Every one who shall say anything against the Son of Man will be forgiven, but for him who slanders the Holy Spirit there will be no forgiveness.

Matthew 12:31-32

Therefore, I tell you, men will be forgiven every sin and slander; but slander against the Holy Spirit will not be forgiven.

2 Thessalonians 1:9

These men will pay the penalty of unutterable Ruin--banished 'from the presence of the Lord and from the glorious manifestation of his might,

Jude 1:7

Like Sodom and Gomorrah and the towns near them, which gave themselves up to fornication, and fell into unnatural vice, these angels now stand out as a warning, undergoing, as they are, the punishment of aeonian fire.

Jude 1:13

They are wild sea waves, foaming with their own shame; they are 'wandering stars,' for which the blackest darkness has been reserved for ever.

Treasury of Scripture Knowledge

Summary

But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation:

General references

Bible References

But is

Mark 12:40
They are the men that rob widows of their homes, and make a pretense of saying long prayers. Their sentence will be all the heavier."
Matthew 25:46
And these last will go away 'into aeonian punishment,' but the righteous 'into aeonian life.'"
2 Thessalonians 1:9
These men will pay the penalty of unutterable Ruin--banished 'from the presence of the Lord and from the glorious manifestation of his might,
Jude 1:7
Like Sodom and Gomorrah and the towns near them, which gave themselves up to fornication, and fell into unnatural vice, these angels now stand out as a warning, undergoing, as they are, the punishment of aeonian fire.

General references

Luke 12:10
Every one who shall say anything against the Son of Man will be forgiven, but for him who slanders the Holy Spirit there will be no forgiveness.