Isaiah 8:20

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

Micah 3:6

Therefore night shall be unto you, that you shall not have a vision; and it shall be dark unto you, that you shall not divine; and the sun shall go down upon the prophets, and the day shall be dark over them.

2 Peter 1:19

We have also a more sure word of prophecy; to which you do well that you take heed, as unto a light that shines in a dark place, until the day dawn, and the day star arise in your hearts:

Isaiah 8:16

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

Psalm 19:7-8

The law of the LORD is perfect, converting the soul: the testimony of the LORD is sure, making wise the simple.

Psalm 119:130

The entrance of your words gives light; it gives understanding unto the simple.

Proverbs 4:18

But the path of the just is as the shining light, that shines more and more unto the perfect day.

Isaiah 1:10

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

Isaiah 30:8-11

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

Jeremiah 8:9

The wise men are ashamed, they are dismayed and taken: lo, they have rejected the word of the LORD; and what wisdom is in them?

Hosea 6:3

Let us know, let us press on to know the LORD: his going forth is prepared as the morning; and he shall come unto us as the rain, as the latter and former rain unto the earth.

Malachi 4:2

But unto you that fear my name shall the Sun of righteousness arise with healing in his wings; and you shall go forth, and grow up like calves of the stall.

Matthew 6:23

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

Matthew 22:29

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

Mark 7:7-9

But in vain do they worship me, teaching for doctrines the commandments of men.

Luke 10:26

He said unto him, What is written in the law? how read you?

Luke 16:29-31

Abraham said unto him, They have Moses and the prophets; let them hear them.

John 5:39

Search the scriptures; for in them you think you have eternal life: and they are they which testify of me.

John 5:46-47

For had you believed Moses, you would have believed me: for he wrote of me.

Acts 17:11

These were more noble than those in Thessalonica, in that they received the word with all readiness of mind, and searched the scriptures daily, whether those 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 through faith, preached before the gospel unto Abraham, saying, In you shall all nations be blessed.

Galatians 4:21-22

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

2 Timothy 3:15-17

And that from a child you have known the holy scriptures, which are able to make you wise unto salvation through faith which is in Christ Jesus.

2 Peter 1:9

But he that lacks these things is blind, and cannot see afar off, and has forgotten that he was purged 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 note it in a book, that it may be for the time to come, forever and ever:
Psalm 19:7
The law of the LORD is perfect, converting the soul: the testimony of the LORD is sure, making wise the simple.
Psalm 119:130
The entrance of your words gives light; it gives understanding unto the simple.
Jeremiah 8:9
The wise men are ashamed, they are dismayed and taken: lo, they have rejected the word of the LORD; and what wisdom is in them?
Micah 3:6
Therefore night shall be unto you, that you shall not have a vision; and it shall be dark unto you, that you shall not divine; and the sun shall go down upon the prophets, and the day shall be dark over them.
Matthew 6:23
But if your eye be evil, your whole body shall be full of darkness. If therefore the light that is in you be darkness, how great is that darkness!
Matthew 22:29
Jesus answered and said unto them, You do err, not knowing the scriptures, nor the power of God.
Mark 7:7
But in vain do they worship me, teaching for doctrines the commandments of men.
Romans 1:22
Professing themselves to be wise, they became fools,
2 Peter 1:9
But he that lacks these things is blind, and cannot see afar off, and has forgotten that he was purged from his old sins.

Light

Proverbs 4:18
But the path of the just is as the shining light, that shines more and more unto the perfect day.
Hosea 6:3
Let us know, let us press on to know the LORD: his going forth is prepared as the morning; and he shall come unto us as the rain, as the latter and former rain unto the earth.
Malachi 4:2
But unto you that fear my name shall the Sun of righteousness arise with healing in his wings; and you shall go forth, and grow up like calves of the stall.
2 Peter 1:19
We have also a more sure word of prophecy; to which you do well that you take heed, as unto a light that shines 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 you light the lamps, the seven lamps shall give light in front of the lampstand.
Micah 5:12
And I will cut off sorceries out of your hand; and you shall have no more soothsayers:
Matthew 14:4
For John said unto him, It is not lawful for you to have her.
Luke 10:26
He said unto him, What is written in the law? how read you?