James 4:17

Therefore to him knowing to do good, and not doing, to him it is sin.

John 9:41

We are not also blind? Jesus said to them If ye were blind, ye had not sinned: and now ye say, That we see; therefore your sin remains.

Luke 12:47-48

And that servant having known his lord's will, and not prepared, neither having done his will, shall be skinned with many.

John 13:17

If ye know these, happy are ye if ye do them.

John 15:22

If I had not come and spoken to them, they had not sin and now they have no pretext for their sin.

Romans 1:20-21

For the invisible things of him from the creation of the world, being understood by things made, are inspected, truly both his eternal power and divinity; so that they are inexcusable:

Romans 1:32

Who knowing the justice of God, that they doing such things are worthy of death, not only do them, but also approve those doing.

Romans 2:17-23

Behold, thou art named a Jew, and restest upon the law, and boastest thyself in God,

Romans 7:13

Was then good death to me? It may not be. But sin, that it might appear sin, by the good working death in me; that sin might be sinful to excess by the command.

2 Peter 2:21

For it was better for them not to have known the way of justice, than, having known, to turn back from the holy command delivererd to them.

Treasury of Scripture Knowledge

Summary

Therefore to him that knoweth to do good, and doeth it not, to him it is sin.

Bible References

General references

Luke 12:47
And that servant having known his lord's will, and not prepared, neither having done his will, shall be skinned with many.
John 9:41
We are not also blind? Jesus said to them If ye were blind, ye had not sinned: and now ye say, That we see; therefore your sin remains.
John 13:17
If ye know these, happy are ye if ye do them.
John 15:22
If I had not come and spoken to them, they had not sin and now they have no pretext for their sin.
Romans 1:20
For the invisible things of him from the creation of the world, being understood by things made, are inspected, truly both his eternal power and divinity; so that they are inexcusable:
Romans 2:17
Behold, thou art named a Jew, and restest upon the law, and boastest thyself in God,
Romans 7:13
Was then good death to me? It may not be. But sin, that it might appear sin, by the good working death in me; that sin might be sinful to excess by the command.