Romans 1:21

because, having known God they did not glorify Him as God, nor gave thanks, but were made vain in their reasonings, and their unintelligent heart was darkened,

Jeremiah 2:5

Thus said Jehovah: What -- have your fathers found in Me perversity, That they have gone far off from Me, And go after the vanity, and become vain,

Ephesians 4:17-18

This, then, I say, and I testify in the Lord; ye are no more to walk, as also the other nations walk, in the vanity of their mind,

2 Kings 17:15

and reject His statutes and His covenant that He made with their fathers, and His testimonies that He testified against them, and go after the vain thing, and become vain, and after the nations that are round about them, of whom Jehovah commanded them not to do like them;

Romans 1:19

Because that which is known of God is manifest among them, for God did manifest it to them,

Revelation 14:7

saying in a great voice, 'Fear ye God, and give to Him glory, because come did the hour of His judgment, and bow ye before Him who did make the heaven, and the land, and sea, and fountains of waters.'

Genesis 6:5

And Jehovah seeth that abundant is the wickedness of man in the earth, and every imagination of the thoughts of his heart only evil all the day;

Genesis 8:21

and Jehovah smelleth the sweet fragrance, and Jehovah saith unto His heart, 'I continue not to disesteem any more the ground because of man, though the imagination of the heart of man is evil from his youth; and I continue not to smite any more all living, as I have done;

Deuteronomy 28:29

and thou hast been gropling at noon, as the blind gropeth in darkness; and thou dost not cause thy ways to prosper; and thou hast been only oppressed and plundered all the days, and there is no saviour.

Psalm 50:23

He who is sacrificing praise honoureth Me, As to him who maketh a way, I cause him to look on the salvation of God!

Psalm 81:12

And I send them away in the enmity of their heart, They walk in their own counsels.

Psalm 86:9

All nations that Thou hast made Come and bow themselves before Thee, O Lord, And give honour to Thy name.

Ecclesiastes 7:29

See, this alone I have found, that God made man upright, and they -- they have sought out many devices.

Isaiah 44:9-20

Framers of a graven image are all of them emptiness, And their desirable things do not profit, And their own witnesses they are, They see not, nor know, that they may be ashamed.

Isaiah 60:2

For, lo, the darkness doth cover the earth, And thick darkness the peoples, And on thee rise doth Jehovah, And His honour on thee is seen.

Jeremiah 10:3-8

For the statutes of the peoples are vanity, For a tree from a forest hath one cut, Work of the hands of an artificer, with an axe,

Jeremiah 10:14-15

Brutish is every man by knowledge, Put to shame is every refiner by a graven image, For false is his molten image. And there is no breath in them.

Jeremiah 16:19

O Jehovah, my strength, and my fortress, And my refuge in a day of adversity, Unto Thee nations do come from the ends of earth, And say, Only falsehood did our fathers inherit, Vanity, and none among them is profitable.

Hosea 2:8

And she knew not that I had given to her, The corn, and the new wine, and the oil. Yea, silver I did multiply to her, And the gold they prepared for Baal.

Habakkuk 1:15-16

Each of them with a hook he hath brought up, He doth catch it in his net, and gathereth it in his drag, Therefore he doth joy and rejoice.

Luke 17:15-18

and one of them having seen that he was healed did turn back, with a loud voice glorifying God,

John 3:19

'And this is the judgment, that the light hath come to the world, and men did love the darkness rather than the light, for their works were evil;

Romans 1:28

And, according as they did not approve of having God in knowledge, God gave them up to a disapproved mind, to do the things not seemly;

Romans 11:10

let their eyes be darkened -- not to behold, and their back do Thou always bow down.'

Romans 15:9

and the nations for kindness to glorify God, according as it hath been written, 'Because of this I will confess to Thee among nations, and to Thy name I will sing praise,'

2 Timothy 3:2

for men shall be lovers of themselves, lovers of money, boasters, proud, evil-speakers, to parents disobedient, unthankful, unkind,

1 Peter 1:18

having known that, not with corruptible things -- silver or gold -- were ye redeemed from your foolish behaviour delivered by fathers,

1 Peter 2:9

and ye are a choice race, a royal priesthood, a holy nation, a people acquired, that the excellences ye may shew forth of Him who out of darkness did call you to His wondrous light;

Revelation 15:4

who may not fear Thee, O Lord, and glorify Thy name? because Thou alone art kind, because all the nations shall come and bow before Thee, because Thy righteous acts were manifested.'

Acts 26:18

to open their eyes, to turn them from darkness to light, and from the authority of the Adversary unto God, for their receiving forgiveness of sins, and a lot among those having been sanctified, by faith that is toward 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 that which is known of God is manifest among them, for God did manifest it to them,
John 3:19
'And this is the judgment, that the light hath come to the world, and men did love the darkness rather than the light, for their works were evil;

They glorified

Romans 15:9
and the nations for kindness to glorify God, according as it hath been written, 'Because of this I will confess to Thee among nations, and to Thy name I will sing praise,'
Psalm 50:23
He who is sacrificing praise honoureth Me, As to him who maketh a way, I cause him to look on the salvation of God!
Psalm 86:9
All nations that Thou hast made Come and bow themselves before Thee, O Lord, And give honour to Thy name.
Hosea 2:8
And she knew not that I had given to her, The corn, and the new wine, and the oil. Yea, silver I did multiply to her, And the gold they prepared for Baal.
Habakkuk 1:15
Each of them with a hook he hath brought up, He doth catch it in his net, and gathereth it in his drag, Therefore he doth joy and rejoice.
Luke 17:15
and one of them having seen that he was healed did turn back, with a loud voice glorifying God,
2 Timothy 3:2
for men shall be lovers of themselves, lovers of money, boasters, proud, evil-speakers, to parents disobedient, unthankful, unkind,
Revelation 14:7
saying in a great voice, 'Fear ye God, and give to Him glory, because come did the hour of His judgment, and bow ye before Him who did make the heaven, and the land, and sea, and fountains of waters.'
Revelation 15:4
who may not fear Thee, O Lord, and glorify Thy name? because Thou alone art kind, because all the nations shall come and bow before Thee, because Thy righteous acts were manifested.'

But became

Genesis 6:5
And Jehovah seeth that abundant is the wickedness of man in the earth, and every imagination of the thoughts of his heart only evil all the day;
Genesis 8:21
and Jehovah smelleth the sweet fragrance, and Jehovah saith unto His heart, 'I continue not to disesteem any more the ground because of man, though the imagination of the heart of man is evil from his youth; and I continue not to smite any more all living, as I have done;
2 Kings 17:15
and reject His statutes and His covenant that He made with their fathers, and His testimonies that He testified against them, and go after the vain thing, and become vain, and after the nations that are round about them, of whom Jehovah commanded them not to do like them;
Psalm 81:12
And I send them away in the enmity of their heart, They walk in their own counsels.
Ecclesiastes 7:29
See, this alone I have found, that God made man upright, and they -- they have sought out many devices.
Isaiah 44:9
Framers of a graven image are all of them emptiness, And their desirable things do not profit, And their own witnesses they are, They see not, nor know, that they may be ashamed.
Jeremiah 2:5
Thus said Jehovah: What -- have your fathers found in Me perversity, That they have gone far off from Me, And go after the vanity, and become vain,
Jeremiah 10:3
For the statutes of the peoples are vanity, For a tree from a forest hath one cut, Work of the hands of an artificer, with an axe,
Jeremiah 16:19
O Jehovah, my strength, and my fortress, And my refuge in a day of adversity, Unto Thee nations do come from the ends of earth, And say, Only falsehood did our fathers inherit, Vanity, and none among them is profitable.
Ephesians 4:17
This, then, I say, and I testify in the Lord; ye are no more to walk, as also the other nations walk, in the vanity of their mind,
1 Peter 1:18
having known that, not with corruptible things -- silver or gold -- were ye redeemed from your foolish behaviour delivered by fathers,

Their foolish

Romans 11:10
let their eyes be darkened -- not to behold, and their back do Thou always bow down.'
Deuteronomy 28:29
and thou hast been gropling at noon, as the blind gropeth in darkness; and thou dost not cause thy ways to prosper; and thou hast been only oppressed and plundered all the days, and there is no saviour.
Isaiah 60:2
For, lo, the darkness doth cover the earth, And thick darkness the peoples, And on thee rise doth Jehovah, And His honour on thee is seen.
Acts 26:18
to open their eyes, to turn them from darkness to light, and from the authority of the Adversary unto God, for their receiving forgiveness of sins, and a lot among those having been sanctified, by faith that is toward me.
1 Peter 2:9
and ye are a choice race, a royal priesthood, a holy nation, a people acquired, that the excellences ye may shew forth of Him who out of darkness did call you to His wondrous light;

General references

Psalm 94:11
He knoweth the thoughts of man, that they are vanity.
Isaiah 40:21
Do ye not know -- do ye not hear? Hath it not been declared from the first to you? Have ye not understood From the foundations of the earth?
Jeremiah 33:18
And to the priests -- the Levites, Not cut off from before Me is one, Causing a burnt-offering to ascend, And perfuming a present, and making sacrifice -- all the days.'
James 4:17
to him, then, knowing to do good, and not doing, sin it is to him.