Hebrews 10:26

For if we sin wilfully, after we have received the knowledge of the truth, there no longer remains any other sacrifice for sins,

2 Peter 2:20-22

For if, after having escaped the pollutions of the world, through the knowledge of our Lord and Saviour Jesus Christ, men are again entangled in them and overpowered, their last state is become worse than their first.

1 John 5:16

If any one sees his brother committing a sin that is not deadly, he shall ask, and God will give him life, for any one who is not committing a deadly sin. There is a deadly sin; concerning that I do not say that he should pray.

Luke 12:47

"The slave who knew his Lord's will, and made not ready, nor did according to his will, will be beaten with many lashes,

John 9:41

"If you were blind," Jesus answered them, "you would have no sin. But now you are declaring, 'We see'; so your sin remains.

John 13:17

If you know these things, happy are you if you do them.

John 15:22-24

"If I had not come and spoken to them, they would have no sin; but now they have no excuse for their sin.

2 Thessalonians 2:10

and with all deceit of unrighteousness for those who are perishing, because they did not receive the love of the truth for their salvation.

1 Timothy 1:13

although I had formerly been a blasphemer and a persecutor and a doer of outrage. But I obtained mercy because I acted ignorantly in unbelief.

Hebrews 6:4-6

For in the case of those who have been once for all enlightened and have tasted of the heavenly gift,

Matthew 12:43-45

"Whenever an unclean spirit leaves a man, it wanders through waterless places, seeking rest but finding none.

Matthew 12:31-32

"Therefore I tell you that every sin and blasphemy shall be forgiven men; but the blasphemy against the Holy Spirit shall not be forgiven.

James 4:17

So to him who knows how to do right and does not do it, to him it is sin.

Treasury of Scripture Knowledge

Summary

For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,

Bible References

If

Hebrews 6:4
For in the case of those who have been once for all enlightened and have tasted of the heavenly gift,
Matthew 12:31
"Therefore I tell you that every sin and blasphemy shall be forgiven men; but the blasphemy against the Holy Spirit shall not be forgiven.
John 9:41
"If you were blind," Jesus answered them, "you would have no sin. But now you are declaring, 'We see'; so your sin remains.
1 Timothy 1:13
although I had formerly been a blasphemer and a persecutor and a doer of outrage. But I obtained mercy because I acted ignorantly in unbelief.
2 Peter 2:20
For if, after having escaped the pollutions of the world, through the knowledge of our Lord and Saviour Jesus Christ, men are again entangled in them and overpowered, their last state is become worse than their first.
1 John 5:16
If any one sees his brother committing a sin that is not deadly, he shall ask, and God will give him life, for any one who is not committing a deadly sin. There is a deadly sin; concerning that I do not say that he should pray.

General references

Matthew 7:27
"And the rain descended, and the floods came, and the winds blew, and beat upon that house, and it fell, and great was the fall of it."
Matthew 24:21
for then shall be a time of great tribulation, such as has not been from the beginning of the world until now, no, and never shall be again.
Mark 3:28
In solemn truth I tell you that the sons of men shall be forgiven all their sins and all the blasphemies they may utter,
Luke 12:10
"If any one shall speak a word against the Son of man it shall be forgiven him; but he who is blasphemes against the Holy Spirit shall not be forgiven.