John 15:22

If I had not come and spoken unto them, they should not have had sin: but now have they nothing to cloak their sin withal.

John 9:41

Jesus said unto them, "If ye were blind, ye should have no sin: but now ye say, 'We see.' Therefore your sin remaineth."

Romans 1:20

So that his invisible things, that is to say, his eternal power and godhead, are understood and seen by the works from the creation of the world. So that they are without excuse,

Ezekiel 2:5

that whether they be obedient or no - for it is a froward household - they may know yet that there hath been a Prophet among them.

Ezekiel 33:31-33

These come unto thee, after the manner of a great people: yea, my people sit down before thee, and hear thy words, but they do not thereafter: for in their mouths they show themselves, as though they were fervent, but their heart goeth after their own covetous lucre.

Luke 12:46

the Lord of that servant will come in a day, when he thinketh not, and at a hour when he is not aware, and will divide him, and will give him his reward, with the unbelievers.

John 3:18-21

He that believeth on him shall not be condemned. But he that believeth not, is condemned already, because he believeth not in the name of the only son of God.

John 12:48

He that refuseth me, and receiveth not my words, hath one that judgeth him. The words that I have spoken, they shall judge him in the last day.

John 19:11

Jesus answered, "Thou couldest have no power at all against me, except it were given unto thee from above. Therefore he that delivered me unto thee, is more in sin."

Acts 17:30

And the time of this ignorance God regarded not: but now he biddeth all men everywhere to repent,

Romans 2:1

Therefore art thou inexcusable, O man, whosoever thou be that judgest. For in the same wherein thou judgest another, thou condemnest thyself. For thou that judgest doest even the same self things.

2 Corinthians 2:14-16

Thanks be unto God which always giveth us the victory in Christ, and openeth the savor of his knowledge by us in every place.

Hebrews 6:4-8

For it is not possible that they which were once lighted, and have tasted of the heavenly gift, and were become partakers of the holy ghost,

James 4:17

Therefore to him that knoweth how to do good, and doth it not: to him, it is sin.

1 Peter 2:16

as free, and not as having the liberty for a cloak of maliciousness: but even as the servants of God.

Treasury of Scripture Knowledge

Summary

If I had not come and spoken unto them, they had not had sin: but now they have no cloke for their sin.

General references

Bible References

Cloke

Romans 1:20
So that his invisible things, that is to say, his eternal power and godhead, are understood and seen by the works from the creation of the world. So that they are without excuse,
Romans 2:1
Therefore art thou inexcusable, O man, whosoever thou be that judgest. For in the same wherein thou judgest another, thou condemnest thyself. For thou that judgest doest even the same self things.
1 Peter 2:16
as free, and not as having the liberty for a cloak of maliciousness: but even as the servants of God.

General references

Luke 10:14
Nevertheless it shall be easier for Tyre and Sidon, at the judgment, than for you.
John 16:9
Of sin, because they believe not on me:
James 4:17
Therefore to him that knoweth how to do good, and doth it not: to him, it is sin.