Isaiah 8:20

To the law and to the testimony! if they speak not according to this word, surely there is no morning for them.

Micah 3:6

Therefore it shall be night unto you, that ye shall have no vision; and it shall be dark unto you, that ye shall not divine; and the sun shall go down upon the prophets, and the day shall be black over them.

2 Peter 1:19

And we have the word of prophecy made more sure; whereunto ye do well that ye take heed, as unto a lamp shining in a dark place, until the day dawn, and the day-star arise in your hearts:

Isaiah 8:16

Bind thou up the testimony, seal the law among my disciples.

Psalm 19:7-8

The law of Jehovah is perfect, restoring the soul: The testimony of Jehovah is sure, making wise the simple.

Psalm 119:130

The opening of thy words giveth light; It giveth understanding unto the simple.

Proverbs 4:18

But the path of the righteous is as the dawning light, That shineth more and more unto the perfect day.

Isaiah 1:10

Hear the word of Jehovah, ye rulers of Sodom; give ear unto the law of our God, ye people of Gomorrah.

Isaiah 30:8-11

Now go, write it before them on a tablet, and inscribe it in a book, that it may be for the time to come for ever and ever.

Jeremiah 8:9

The wise men are put to shame, they are dismayed and taken: lo, they have rejected the word of Jehovah; and what manner of wisdom is in them?

Hosea 6:3

And let us know, let us follow on to know Jehovah: his going forth is sure as the morning; and he will come unto us as the rain, as the latter rain that watereth the earth.

Malachi 4:2

But unto you that fear my name shall the sun of righteousness arise with healing in its wings; and ye shall go forth, and gambol as calves of the stall.

Matthew 6:23

But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is the darkness!

Matthew 22:29

But Jesus answered and said unto them, Ye do err, not knowing the scriptures, nor the power of God.

Mark 7:7-9

But in vain do they worship me, Teaching as their doctrines the precepts of men.

Luke 10:26

And he said unto him, What is written in the law? how readest thou?

Luke 16:29-31

But Abraham saith, They have Moses and the prophets; let them hear them.

John 5:39

Ye search the scriptures, because ye think that in them ye have eternal life; and these are they which bear witness of me;

John 5:46-47

For if ye believed Moses, ye would believe me; for he wrote of me.

Acts 17:11

Now these were more noble than those in Thessalonica, in that they received the word with all readiness of the mind, examining the Scriptures daily, whether these things were so.

Romans 1:22

Professing themselves to be wise, they became fools,

Galatians 3:8-29

And the scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel beforehand unto Abraham,'saying, In thee shall all the nations be blessed.

Galatians 4:21-22

Tell me, ye that desire to be under the law, do ye not hear the law?

2 Timothy 3:15-17

And that from a babe thou hast known the sacred writings which are able to make thee wise unto salvation through faith which is in Christ Jesus.

2 Peter 1:9

For he that lacketh these things is blind, seeing only what is near, having forgotten the cleansing from his old sins.

Treasury of Scripture Knowledge

Summary

To the law and to the testimony: if they speak not according to this word, it is because there is no light in them.

Bible References

It is

Isaiah 30:8
Now go, write it before them on a tablet, and inscribe it in a book, that it may be for the time to come for ever and ever.
Psalm 19:7
The law of Jehovah is perfect, restoring the soul: The testimony of Jehovah is sure, making wise the simple.
Psalm 119:130
The opening of thy words giveth light; It giveth understanding unto the simple.
Jeremiah 8:9
The wise men are put to shame, they are dismayed and taken: lo, they have rejected the word of Jehovah; and what manner of wisdom is in them?
Micah 3:6
Therefore it shall be night unto you, that ye shall have no vision; and it shall be dark unto you, that ye shall not divine; and the sun shall go down upon the prophets, and the day shall be black over them.
Matthew 6:23
But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is the darkness!
Matthew 22:29
But Jesus answered and said unto them, Ye do err, not knowing the scriptures, nor the power of God.
Mark 7:7
But in vain do they worship me, Teaching as their doctrines the precepts of men.
Romans 1:22
Professing themselves to be wise, they became fools,
2 Peter 1:9
For he that lacketh these things is blind, seeing only what is near, having forgotten the cleansing from his old sins.

Light

Proverbs 4:18
But the path of the righteous is as the dawning light, That shineth more and more unto the perfect day.
Hosea 6:3
And let us know, let us follow on to know Jehovah: his going forth is sure as the morning; and he will come unto us as the rain, as the latter rain that watereth the earth.
Malachi 4:2
But unto you that fear my name shall the sun of righteousness arise with healing in its wings; and ye shall go forth, and gambol as calves of the stall.
2 Peter 1:19
And we have the word of prophecy made more sure; whereunto ye do well that ye take heed, as unto a lamp shining in a dark place, until the day dawn, and the day-star arise in your hearts:

General references

Numbers 8:2
Speak unto Aaron, and say unto him, When thou lightest the lamps, the seven lamps shall give light in front of the candlestick.
Micah 5:12
And I will cut off witchcrafts out of thy hand; and thou shalt have no more'soothsayers:
Matthew 14:4
For John said unto him, It is not lawful for thee to have her.
Luke 10:26
And he said unto him, What is written in the law? how readest thou?

American Standard Version Public Domain