Hebrews 10:26

If we continue to (practice) (deliberately persist in) sin willfully after we have received the knowledge of the truth, there remains no more sacrifice for sins.

2 Peter 2:20-22

After they have escaped the defilements of the world through the knowledge of the Lord and Savior Jesus Christ, they are again entangled and overcome; the last state is worse with them than the first.

1 John 5:16

If any man see his brother committing a sin not leading to death, he will ask, and God will give him life for them that sin not leading to death. There is a sin that leads to death. I do not say that he should make request concerning this.

Leviticus 4:2

to tell the people of Israel: If a person sins unintentionally and does not keep Jehovah's commandments he would have to observe the following rules:

Leviticus 4:13

If the whole congregation of Israel commits error and the matter escapes the notice of the assembly, and they commit any of the things that Jehovah commands not to be done they become guilty.

Numbers 15:28-31

The priest shall perform the ritual of purification at the altar to purify you from your sin. You will be forgiven.

Deuteronomy 17:12

The man who acts presumptuously and does not listen to the priest or the judge will die. This way you will purge the evil from Israel. The priests and judges are there to serve Jehovah your God.

Daniel 5:22-23

You his son, O Belshazzar, have not humbled your heart, though you know all this.

Luke 12:47

The unfaithful servant who knew what his master wanted and did not do it will be beaten.

John 9:41

Jesus replied: If you were blind you would have no sin. But you say we see so your sin remains.

John 13:17

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

John 15:22-24

If I had not come and spoken to them, they would not have sin. Now they have no excuse for their sin!

2 Thessalonians 2:10

He will use every kind of wicked deceit on those who will perish. They will perish because they did not welcome and love the truth so as to be saved.

1 Timothy 1:13

I was a blasphemer, and a persecutor, and a violent aggressor. I was shown mercy, because I did it ignorantly in unbelief.

Hebrews 6:4-6

Those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Spirit,

Matthew 12:43-45

When an unclean spirit goes out of a man it passes through the desert seeking rest. It does not find it.

Psalm 19:12-13

Who can notice (discern) (understand) every mistake? Forgive my hidden faults.

Matthew 12:31-32

Therefore I say to you, every sin and blasphemy will be forgiven men. But the blasphemy against God's Spirit will not be forgiven.

James 4:17

He that knows to do good, 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
Those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Spirit,
Leviticus 4:2
to tell the people of Israel: If a person sins unintentionally and does not keep Jehovah's commandments he would have to observe the following rules:
Numbers 15:28
The priest shall perform the ritual of purification at the altar to purify you from your sin. You will be forgiven.
Deuteronomy 17:12
The man who acts presumptuously and does not listen to the priest or the judge will die. This way you will purge the evil from Israel. The priests and judges are there to serve Jehovah your God.
Psalm 19:12
Who can notice (discern) (understand) every mistake? Forgive my hidden faults.
Daniel 5:22
You his son, O Belshazzar, have not humbled your heart, though you know all this.
Matthew 12:31
Therefore I say to you, every sin and blasphemy will be forgiven men. But the blasphemy against God's Spirit will not be forgiven.
John 9:41
Jesus replied: If you were blind you would have no sin. But you say we see so your sin remains.
1 Timothy 1:13
I was a blasphemer, and a persecutor, and a violent aggressor. I was shown mercy, because I did it ignorantly in unbelief.
2 Peter 2:20
After they have escaped the defilements of the world through the knowledge of the Lord and Savior Jesus Christ, they are again entangled and overcome; the last state is worse with them than the first.
1 John 5:16
If any man see his brother committing a sin not leading to death, he will ask, and God will give him life for them that sin not leading to death. There is a sin that leads to death. I do not say that he should make request concerning this.

General references

Deuteronomy 18:19
Whoever refuses to listen to the words that the prophet speaks in my name will answer to me.
Matthew 7:27
The rain descended, and the floods came, and the winds blew and battered the house and it fell with a great crash.
Matthew 24:21
There will be great tribulation. It will be greater than any has ever been from the beginning of the world until now.
Mark 3:28
I tell you sins will be forgiven of the sons of men, and their evil talk will be forgiven.
Luke 12:10
He who speaks against the Son of man will be forgiven. However he who blasphemes against Holy Spirit will not be forgiven.