Mark 3:28

Verily I say to you, All sins shall be forgiven the sons of men and blasphemies wherewith soever they shall blaspheme.

Matthew 12:31-32

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.

Luke 12:10

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.

1 John 5:16

If any one see his brother sin a sin which is not unto death, let him ask, and he will give him life for them that sin not unto death.

Mark 3:28-30

Verily I say to you, All sins shall be forgiven the sons of men and blasphemies wherewith soever they shall blaspheme.

Hebrews 6:4-8

For it is impossible for those who were once inlightened, and have tasted the heavenly gift, and been made partakers of the Holy Ghost,

Hebrews 10:26-31

For when we sin wilfully after receiving the knowledge of the truth, there remaineth no more sacrifice for sins,

Treasury of Scripture Knowledge

Summary

Verily I say unto you, All sins shall be forgiven unto the sons of men, and blasphemies wherewith soever they shall blaspheme:

Bible References

General references

Matthew 12:31
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.
Luke 12:10
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.
Hebrews 6:4
For it is impossible for those who were once inlightened, and have tasted the heavenly gift, and been made partakers of the Holy Ghost,
Hebrews 10:26
For when we sin wilfully after receiving the knowledge of the truth, there remaineth no more sacrifice for sins,
1 John 5:16
If any one see his brother sin a sin which is not unto death, let him ask, and he will give him life for them that sin not unto death.