Mark 3:29

but whosoever shall blaspheme against the Holy Spirit hath never forgiveness, but is guilty of an eternal sin:

Matthew 25:46

And these shall go away into eternal punishment: but the righteous into eternal life.

Mark 12:40

they that devour widows houses, and for a pretence make long prayers; these shall receive greater condemnation.

Luke 12:10

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.

Matthew 12:31-32

Therefore I say unto you, Every sin and blasphemy shall be forgiven unto men; but the blasphemy against the Spirit shall not be forgiven.

2 Thessalonians 1:9

who shall suffer punishment, even eternal destruction from the face of the Lord and from the glory of his might,

Jude 1:7

Even as Sodom and Gomorrah, and the cities about them, having in like manner with these given themselves over to fornication and gone after strange flesh, are set forth as an example, suffering the punishment of eternal fire.

Jude 1:13

Wild waves of the sea, foaming out their own shame; wandering stars, for whom the blackness of darkness hath been reserved forever.

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 that devour widows houses, and for a pretence make long prayers; these shall receive greater condemnation.
Matthew 25:46
And these shall go away into eternal punishment: but the righteous into eternal life.
2 Thessalonians 1:9
who shall suffer punishment, even eternal destruction from the face of the Lord and from the glory of his might,
Jude 1:7
Even as Sodom and Gomorrah, and the cities about them, having in like manner with these given themselves over to fornication and gone after strange flesh, are set forth as an example, suffering the punishment of eternal fire.

General references

Luke 12:10
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.

American Standard Version Public Domain