1 John 5:17

All unrighteousness is sin, and there is a sin not leading to death.

1 John 3:4

Everyone who practices sin also practices lawlessness; and sin is lawlessness.

1 John 5:16

If anyone sees his brother committing a sin not leading to death, he shall ask and God will for him give life to those who commit sin not leading to death. There is a sin leading to death; I do not say that he should make request for this.

Isaiah 1:18

“Come now, and let us reason together,”
Says the Lord,
Though your sins are as scarlet,
They will be as white as snow;
Though they are red like crimson,
They will be like wool.

Deuteronomy 5:32

So you shall observe to do just as the Lord your God has commanded you; you shall not turn aside to the right or to the left.

Deuteronomy 12:32

Whatever I command you, you shall be careful to do; you shall not add to nor take away from it.

Ezekiel 18:26-32

When a righteous man turns away from his righteousness, commits iniquity and dies because of it, for his iniquity which he has committed he will die.

Romans 5:20-21

The Law came in so that the transgression would increase; but where sin increased, grace abounded all the more,

James 1:15

Then when lust has conceived, it gives birth to sin; and when sin is accomplished, it brings forth death.

James 4:7-10

Submit therefore to God. Resist the devil and he will flee from you.

1 John 2:1

My little children, I am writing these things to you so that you may not sin. And if anyone sins, we have an Advocate with the Father, Jesus Christ the righteous;

Treasury of Scripture Knowledge

Summary

All unrighteousness is sin: and there is a sin not unto death.

General references

Bible References

All

1 John 3:4
Everyone who practices sin also practices lawlessness; and sin is lawlessness.
Deuteronomy 5:32
So you shall observe to do just as the Lord your God has commanded you; you shall not turn aside to the right or to the left.
Deuteronomy 12:32
Whatever I command you, you shall be careful to do; you shall not add to nor take away from it.

And

1 John 5:16
If anyone sees his brother committing a sin not leading to death, he shall ask and God will for him give life to those who commit sin not leading to death. There is a sin leading to death; I do not say that he should make request for this.
Isaiah 1:18
“Come now, and let us reason together,”
Says the Lord,
Though your sins are as scarlet,
They will be as white as snow;
Though they are red like crimson,
They will be like wool.
Ezekiel 18:26
When a righteous man turns away from his righteousness, commits iniquity and dies because of it, for his iniquity which he has committed he will die.
Romans 5:20
The Law came in so that the transgression would increase; but where sin increased, grace abounded all the more,
James 1:15
Then when lust has conceived, it gives birth to sin; and when sin is accomplished, it brings forth death.
James 4:7
Submit therefore to God. Resist the devil and he will flee from you.

General references

Jude 1:22
And have mercy on some, who are doubting;