Romans 1:21

Because, knowing God, they glorified him not as God, neither were thankful; but fell into folly in their thoughts, and their heart without understanding was darkened:

Jeremiah 2:5

Thus saith Jehovah: What injustice have your fathers found in me, that they are gone far from me, and have walked after vanity, and become vain?

Ephesians 4:17-18

This I say therefore, and testify in the Lord, that ye should no longer walk as the rest of the nations walk in the vanity of their mind,

2 Kings 17:15

And they rejected his statutes, and his covenant which he had made with their fathers, and his testimonies which he had testified unto them; and they followed vanity and became vain, and went after the nations that were round about them, concerning whom Jehovah had charged them that they should not do like them.

Romans 1:19

Because what is known of God is manifest among them, for God has manifested it to them,

Revelation 14:7

saying with a loud voice, Fear God and give him glory, for the hour of his judgment has come; and do homage to him who has made the heaven and the earth and the sea and fountains of waters.

Genesis 6:5

And Jehovah saw that the wickedness of Man was great on the earth, and every imagination of the thoughts of his heart only evil continually.

Genesis 8:21

And Jehovah smelled the sweet odour. And Jehovah said in his heart, I will no more henceforth curse the ground on account of Man, for the thought of Man's heart is evil from his youth; and I will no more smite every living thing, as I have done.

Deuteronomy 28:29

and thou shalt grope at noonday, as the blind gropeth in darkness, and thou shalt not prosper in thy ways; and thou shalt be only oppressed and spoiled continually, and there shall be none to save.

Psalm 50:23

Whoso offereth praise glorifieth me; and to him that ordereth his way will I shew the salvation of God.

Psalm 81:12

So I gave them up unto their own hearts' stubbornness: they walked after their own counsels.

Psalm 86:9

All nations whom thou hast made shall come and worship before thee, O Lord, and shall glorify thy name.

Ecclesiastes 7:29

Only see this which I have found: that God made man upright, but they have sought out many devices.

Isaiah 44:9-20

They that form a graven image are all of them vanity, and their delectable things are of no profit; and they are their own witnesses: they see not, nor know; that they may be ashamed.

Isaiah 60:2

For behold, darkness shall cover the earth, and gross darkness the peoples; but Jehovah will arise upon thee, and his glory shall be seen on thee.

Jeremiah 10:3-8

For the statutes of the peoples are vanity; for it is a tree cut out of the forest, worked with a chisel by the hands of the artizan;

Jeremiah 10:14-15

Every man is become brutish, bereft of knowledge; every founder is put to shame by the graven image, for his molten image is falsehood, and there is no breath in them.

Jeremiah 16:19

Jehovah, my strength and my fortress, and my refuge in the day of distress, unto thee shall the nations come from the ends of the earth, and they shall say, Surely our fathers have inherited falsehood and vanity; and in these things there is no profit.

Hosea 2:8

And she did not know that I had given her the corn and the new wine and the oil, and had multiplied to her the silver and gold, which they employed for Baal.

Habakkuk 1:15-16

He taketh up all of them with the hook, he catcheth them in his net, and gathereth them into his drag; therefore he rejoiceth and is glad:

Luke 17:15-18

And one of them, seeing that he was cured, turned back, glorifying God with a loud voice,

John 3:19

And this is the judgment, that light is come into the world, and men have loved darkness rather than light; for their works were evil.

Romans 1:28

And according as they did not think good to have God in their knowledge, God gave them up to a reprobate mind to practise unseemly things;

Romans 11:10

let their eyes be darkened not to see, and bow down their back alway.

Romans 15:9

and that the nations should glorify God for mercy; according as it is written, For this cause I will confess to thee among the nations, and will sing to thy name.

2 Timothy 3:2

for men shall be lovers of self, lovers of money, boastful, arrogant, evil speakers, disobedient to parents, ungrateful, profane,

1 Peter 1:18

knowing that ye have been redeemed, not by corruptible things, as silver or gold, from your vain conversation handed down from your fathers,

1 Peter 2:9

But ye are a chosen race, a kingly priesthood, a holy nation, a people for a possession, that ye might set forth the excellencies of him who has called you out of darkness to his wonderful light;

Revelation 15:4

Who shall not fear thee, O Lord, and glorify thy name? for thou only art holy; for all nations shall come and do homage before thee; for thy righteousnesses have been made manifest.

Acts 26:18

to open their eyes, that they may turn from darkness to light, and from the power of Satan to God, that they may receive remission of sins and inheritance among them that are sanctified by faith in me.

Treasury of Scripture Knowledge

Summary

Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.

Bible References

When

Romans 1:19
Because what is known of God is manifest among them, for God has manifested it to them,
John 3:19
And this is the judgment, that light is come into the world, and men have loved darkness rather than light; for their works were evil.

They glorified

Romans 15:9
and that the nations should glorify God for mercy; according as it is written, For this cause I will confess to thee among the nations, and will sing to thy name.
Psalm 50:23
Whoso offereth praise glorifieth me; and to him that ordereth his way will I shew the salvation of God.
Psalm 86:9
All nations whom thou hast made shall come and worship before thee, O Lord, and shall glorify thy name.
Hosea 2:8
And she did not know that I had given her the corn and the new wine and the oil, and had multiplied to her the silver and gold, which they employed for Baal.
Habakkuk 1:15
He taketh up all of them with the hook, he catcheth them in his net, and gathereth them into his drag; therefore he rejoiceth and is glad:
Luke 17:15
And one of them, seeing that he was cured, turned back, glorifying God with a loud voice,
2 Timothy 3:2
for men shall be lovers of self, lovers of money, boastful, arrogant, evil speakers, disobedient to parents, ungrateful, profane,
Revelation 14:7
saying with a loud voice, Fear God and give him glory, for the hour of his judgment has come; and do homage to him who has made the heaven and the earth and the sea and fountains of waters.
Revelation 15:4
Who shall not fear thee, O Lord, and glorify thy name? for thou only art holy; for all nations shall come and do homage before thee; for thy righteousnesses have been made manifest.

But became

Genesis 6:5
And Jehovah saw that the wickedness of Man was great on the earth, and every imagination of the thoughts of his heart only evil continually.
Genesis 8:21
And Jehovah smelled the sweet odour. And Jehovah said in his heart, I will no more henceforth curse the ground on account of Man, for the thought of Man's heart is evil from his youth; and I will no more smite every living thing, as I have done.
2 Kings 17:15
And they rejected his statutes, and his covenant which he had made with their fathers, and his testimonies which he had testified unto them; and they followed vanity and became vain, and went after the nations that were round about them, concerning whom Jehovah had charged them that they should not do like them.
Psalm 81:12
So I gave them up unto their own hearts' stubbornness: they walked after their own counsels.
Ecclesiastes 7:29
Only see this which I have found: that God made man upright, but they have sought out many devices.
Isaiah 44:9
They that form a graven image are all of them vanity, and their delectable things are of no profit; and they are their own witnesses: they see not, nor know; that they may be ashamed.
Jeremiah 2:5
Thus saith Jehovah: What injustice have your fathers found in me, that they are gone far from me, and have walked after vanity, and become vain?
Jeremiah 10:3
For the statutes of the peoples are vanity; for it is a tree cut out of the forest, worked with a chisel by the hands of the artizan;
Jeremiah 16:19
Jehovah, my strength and my fortress, and my refuge in the day of distress, unto thee shall the nations come from the ends of the earth, and they shall say, Surely our fathers have inherited falsehood and vanity; and in these things there is no profit.
Ephesians 4:17
This I say therefore, and testify in the Lord, that ye should no longer walk as the rest of the nations walk in the vanity of their mind,
1 Peter 1:18
knowing that ye have been redeemed, not by corruptible things, as silver or gold, from your vain conversation handed down from your fathers,

Their foolish

Romans 11:10
let their eyes be darkened not to see, and bow down their back alway.
Deuteronomy 28:29
and thou shalt grope at noonday, as the blind gropeth in darkness, and thou shalt not prosper in thy ways; and thou shalt be only oppressed and spoiled continually, and there shall be none to save.
Isaiah 60:2
For behold, darkness shall cover the earth, and gross darkness the peoples; but Jehovah will arise upon thee, and his glory shall be seen on thee.
Acts 26:18
to open their eyes, that they may turn from darkness to light, and from the power of Satan to God, that they may receive remission of sins and inheritance among them that are sanctified by faith in me.
1 Peter 2:9
But ye are a chosen race, a kingly priesthood, a holy nation, a people for a possession, that ye might set forth the excellencies of him who has called you out of darkness to his wonderful light;

General references

Psalm 94:11
Jehovah knoweth the thoughts of man, that they are vanity.
Isaiah 40:21
do ye not know? have ye not heard? hath it not been told you from the beginning? have ye not understood the foundation of the earth?
Jeremiah 33:18
neither shall there fail to the priests the Levites a man before me to offer up burnt-offerings, and to burn oblations, and to do sacrifice continually.
James 4:17
To him therefore who knows how to do good, and does it not, to him it is sin.