Ecclesiastes 11:8

For if a man lives many years, let him rejoice in all of them! Let him remember that the days of the darkness will be many-- all that is coming [is] vanity!

Deuteronomy 32:29

If only they were wise, they would understand this; they would discern {for themselves their end}.

Job 10:22

to [the] land of darkness, like [the] darkness of a deep shadow and {chaos}, so that it shines forth like darkness.'"

Job 14:10

"But a man dies, and he dwindles away; thus a human being passes away, and where is he?

Job 15:23

"He is wandering for bread, [saying], 'Where [is it]?' He knows that a day of darkness [is] ready {at hand}.

Job 18:18

"They thrust him from light into darkness, and they drive him out from [the] world.

Ecclesiastes 2:1-11

I said {to myself}, "Come! I will test pleasure {to see whether it is worthwhile}." But look, "This also [is] vanity!"

Ecclesiastes 2:15

So I said {to myself}, "{If I also suffer the same fate as the fool}, {what advantage is my great wisdom}?" So I said {to myself}, "This also [is] vanity!"

Ecclesiastes 2:17

So I hated life because the work done under the sun [is] grievous to me. For everything [is] vanity and chasing wind!

Ecclesiastes 2:19

And who knows [whether] he will be wise or foolish? Yet he will exercise control of all [the fruit of] my toil with which I toiled wisely under the sun. This also [is] vanity!

Ecclesiastes 2:21-23

For although a person may toil with great wisdom and skill, he must leave his reward to someone who has not toiled for it. This also [is] vanity and a great calamity.

Ecclesiastes 2:26

For to the person who [is] good in his eyes, he gives wisdom, knowledge, and joy; but to the sinner he gives the task of gathering and heaping up only to give [it] to [him who is] pleasing to him. This also [is] vanity and chasing wind!

Ecclesiastes 3:12-13

So I realized that there is {nothing better} for them than to {rejoice and enjoy themselves} during their lives.

Ecclesiastes 4:8

Sometimes a man is all alone with no companion; he also has neither son nor brother. Yet there is no end to all his toil, and his eye is not satisfied with wealth. [He laments,] "For whom am I toiling and depriving {myself} of pleasure?" This also [is] vanity--it is an unhappy business!

Ecclesiastes 4:16

There is no end to all the people, to all who were before him. Yet the later generation will not rejoice in him, for this also [is] vanity and chasing wind!

Ecclesiastes 5:15-16

Just as he came from his mother's womb naked, {he will depart} just as he came; he will take nothing with him for his toil.

Ecclesiastes 5:18-20

Look! I have discovered what is good and fitting: to eat and to drink and {to enjoy} all [the fruit of] the toil with which one toils under the sun during the number of the days of his life that God gives to him--for this [is] his lot.

Ecclesiastes 6:6

Even if a man lives a thousand years twice, if he does not enjoy {prosperity}, {both suffer the same fate}!

Ecclesiastes 6:11

{Increasing words only multiplies futility}, how does that profit anyone?

Ecclesiastes 7:14

In the day of prosperity, rejoice! But in the day of adversity, consider! For God made one in place of another so that mortals cannot find out what will happen {in the future}.

Ecclesiastes 8:12

Although the sinner does evil a hundred times and prolongs his life, yet I also know that it will be good for those who fear God--because they fear {his presence}.

Ecclesiastes 8:15

So I recommend enjoyment. For there [is] nothing better for man under the sun than to eat and to drink and to rejoice. This will accompany him in his toil the days of his life that God gives to him under the sun.

Ecclesiastes 12:1-5

Remember your Creator in the days of your youth-- before the days of trouble come and the years draw near when you will say, "I find no pleasure in them!"

Jeremiah 13:16

Give glory to Yahweh your God {before} he brings darkness, and {before} your feet stumble on the mountains at twilight. And you will hope for light, but he makes it as gloom, he makes [it] as thick darkness.

Joel 2:2

A day of darkness and gloom, a day of cloud and thick darkness, like the dawn spreads on the mountains, a great and strong army! There has been nothing like it from old, and after it nothing will be again {for generations to come}.

Matthew 22:13

Then the king said to the servants, 'Tie him up {hand and foot} [and] throw him into the outer darkness. In that place there will be weeping and gnashing of teeth!'

John 12:35

So Jesus said to them, "Yet a little time the light is with you! Walk while you have the light, so that the darkness does not overtake you! And the one who walks in the darkness does not know where he is going.

Jude 1:18

for they said to you, "In the end time there will be scoffers following according to their own ungodly desires."

Treasury of Scripture Knowledge

Summary

But if a man live many years, and rejoice in them all; yet let him remember the days of darkness; for they shall be many. All that cometh is vanity.

General references

Bible References

If a man

Ecclesiastes 6:6
Even if a man lives a thousand years twice, if he does not enjoy {prosperity}, {both suffer the same fate}!
Ecclesiastes 8:12
Although the sinner does evil a hundred times and prolongs his life, yet I also know that it will be good for those who fear God--because they fear {his presence}.

Rejoice

Ecclesiastes 3:12
So I realized that there is {nothing better} for them than to {rejoice and enjoy themselves} during their lives.
Ecclesiastes 5:18
Look! I have discovered what is good and fitting: to eat and to drink and {to enjoy} all [the fruit of] the toil with which one toils under the sun during the number of the days of his life that God gives to him--for this [is] his lot.
Ecclesiastes 8:15
So I recommend enjoyment. For there [is] nothing better for man under the sun than to eat and to drink and to rejoice. This will accompany him in his toil the days of his life that God gives to him under the sun.

Yet

Ecclesiastes 7:14
In the day of prosperity, rejoice! But in the day of adversity, consider! For God made one in place of another so that mortals cannot find out what will happen {in the future}.
Ecclesiastes 12:1
Remember your Creator in the days of your youth-- before the days of trouble come and the years draw near when you will say, "I find no pleasure in them!"
Deuteronomy 32:29
If only they were wise, they would understand this; they would discern {for themselves their end}.
Job 10:22
to [the] land of darkness, like [the] darkness of a deep shadow and {chaos}, so that it shines forth like darkness.'"
Job 14:10
"But a man dies, and he dwindles away; thus a human being passes away, and where is he?
Job 15:23
"He is wandering for bread, [saying], 'Where [is it]?' He knows that a day of darkness [is] ready {at hand}.
Job 18:18
"They thrust him from light into darkness, and they drive him out from [the] world.
Jeremiah 13:16
Give glory to Yahweh your God {before} he brings darkness, and {before} your feet stumble on the mountains at twilight. And you will hope for light, but he makes it as gloom, he makes [it] as thick darkness.
Joel 2:2
A day of darkness and gloom, a day of cloud and thick darkness, like the dawn spreads on the mountains, a great and strong army! There has been nothing like it from old, and after it nothing will be again {for generations to come}.
Matthew 22:13
Then the king said to the servants, 'Tie him up {hand and foot} [and] throw him into the outer darkness. In that place there will be weeping and gnashing of teeth!'
John 12:35
So Jesus said to them, "Yet a little time the light is with you! Walk while you have the light, so that the darkness does not overtake you! And the one who walks in the darkness does not know where he is going.
Jude 1:18
for they said to you, "In the end time there will be scoffers following according to their own ungodly desires."

All that

Ecclesiastes 2:1
I said {to myself}, "Come! I will test pleasure {to see whether it is worthwhile}." But look, "This also [is] vanity!"
Ecclesiastes 4:8
Sometimes a man is all alone with no companion; he also has neither son nor brother. Yet there is no end to all his toil, and his eye is not satisfied with wealth. [He laments,] "For whom am I toiling and depriving {myself} of pleasure?" This also [is] vanity--it is an unhappy business!
Ecclesiastes 5:15
Just as he came from his mother's womb naked, {he will depart} just as he came; he will take nothing with him for his toil.
Ecclesiastes 6:11
{Increasing words only multiplies futility}, how does that profit anyone?

General references

Ecclesiastes 1:2
"Vanity of vanities!" says the Teacher, "Vanity of vanities! All [is] vanity!"