James 4:17

Therefore to him that knows to do good, and does it not, to him it is sin.

John 9:41

Jesus said to them, If you were blind you would not have sin: but now you say that, We see: your sin remaineth.

Luke 12:47-48

But that servant knowing the will of his lord, and not preparing or doing according to his will, shall be beaten with many stripes.

John 13:17

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

John 15:22

If I did not come and speak to them, they had not sin: now they have no excuse for their sin.

Romans 1:20-21

for the invisible things of Him from the creation of the world are seen, being known by the things which are made, even His eternal power and divinity; so that they are without excuse:

Romans 1:32

who, knowing the rightfulness of God, that those who do such things are worthy of death, not only do the same, but they even delight in those who are doing them.

Romans 2:17-23

But if you are denominated a Jew, and rest in the law, and boast in God,

Romans 7:13

Then did that which is good become death to me? it could not be so: but sin, that it may appear sin, through the good was working out death to me, in order that sin may be exceedingly sinful through the commandment.

2 Peter 2:21

For it was better for them not to have known the way of righteousness, than, having known it, to turn away from the holy commandment which has been delivered unto 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
But that servant knowing the will of his lord, and not preparing or doing according to his will, shall be beaten with many stripes.
John 9:41
Jesus said to them, If you were blind you would not have sin: but now you say that, We see: your sin remaineth.
John 13:17
If you know these things, happy are ye if you may do them.
John 15:22
If I did not come and speak to them, they had not sin: now they have no excuse for their sin.
Romans 1:20
for the invisible things of Him from the creation of the world are seen, being known by the things which are made, even His eternal power and divinity; so that they are without excuse:
Romans 2:17
But if you are denominated a Jew, and rest in the law, and boast in God,
Romans 7:13
Then did that which is good become death to me? it could not be so: but sin, that it may appear sin, through the good was working out death to me, in order that sin may be exceedingly sinful through the commandment.