Matthew 12:31

Therefore I say to you, That every sin and impious speech shad be forgiven men: but the impious speech against the Spirit shall not be forgiven men.

Luke 12:10

And whoever shall speak a word against the Son of man, it shall be forgiven him; but he that speaks impiously against the Holy Spirit, shall not be forgiven.

Mark 3:28-30

Verily I say to you, All sins shall be forgiven the sons of men, and whatever impious speeches they may utter;

Acts 7:51

You stiff-necked, and uncircumcised in heart and in ears, you do always resist the Holy Spirit; as your fathers did, so also do you.

Hebrews 6:4

For it is impossible to renew again to repentance those who have once been enlightened, and have tasted of the heavenly gift, and have been made partakers of the Holy Spirit,

Hebrews 10:26

For if we sin willfully, after we have received the knowledge of the truth, there remains no longer a sacrifice for sins;

Hebrews 10:29

of how much severer punishment do you think he shall be thought worthy, who has trodden under foot the Son of God, and has counted the blood of the covenant, with which he was sanctified, a common thing, and has done despite to the Spirit of grace?

1 John 1:9

If we confess our sins, he is faithful and just, so that he will forgive us our sins, and cleanse us from all unrighteousness.

1 John 5:16

If any one see his brother sinning a sin not to death, he shall ask, and he will give him life for those who sin not to death. There is a sin to death: I do not say concerning this, that he should ask.

Matthew 12:31-32

Therefore I say to you, That every sin and impious speech shad be forgiven men: but the impious speech against the Spirit shall not be forgiven men.

1 Timothy 1:13-15

me, I say, who before was a reviler and a persecutor and an overbearing man. But I obtained mercy, because I did it ignorantly in unbelief:

1 John 2:1-2

My little children, I write these things to you, that you may not sin: and yet, if any one sin, we have an advocate with the Father, Jesus Christ the righteous.

Treasury of Scripture Knowledge

Summary

Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men.

General references

Bible References

All

1 Timothy 1:13
me, I say, who before was a reviler and a persecutor and an overbearing man. But I obtained mercy, because I did it ignorantly in unbelief:
Hebrews 6:4
For it is impossible to renew again to repentance those who have once been enlightened, and have tasted of the heavenly gift, and have been made partakers of the Holy Spirit,
1 John 1:9
If we confess our sins, he is faithful and just, so that he will forgive us our sins, and cleanse us from all unrighteousness.
1 John 2:1
My little children, I write these things to you, that you may not sin: and yet, if any one sin, we have an advocate with the Father, Jesus Christ the righteous.

But

Mark 3:28
Verily I say to you, All sins shall be forgiven the sons of men, and whatever impious speeches they may utter;
Luke 12:10
And whoever shall speak a word against the Son of man, it shall be forgiven him; but he that speaks impiously against the Holy Spirit, shall not be forgiven.
Acts 7:51
You stiff-necked, and uncircumcised in heart and in ears, you do always resist the Holy Spirit; as your fathers did, so also do you.
1 John 5:16
If any one see his brother sinning a sin not to death, he shall ask, and he will give him life for those who sin not to death. There is a sin to death: I do not say concerning this, that he should ask.

General references

Mark 3:28
Verily I say to you, All sins shall be forgiven the sons of men, and whatever impious speeches they may utter;
Luke 12:10
And whoever shall speak a word against the Son of man, it shall be forgiven him; but he that speaks impiously against the Holy Spirit, shall not be forgiven.