Ecclesiastes 6:7

All the labor of man for his mouth, and also the soul shall not be filled.

Proverbs 16:26

The soul of him laboring, labored for himself; for his mouth urged upon him.

Genesis 3:17-19

And to Adam he said, Because thou didst listen to the voice of thy wife, and thou wilt eat from the tree which I commanded thee, saying, Thou shalt not eat from it; cursed the earth for thy sake; in labor shalt thou eat of it all the days of thy life;

Ecclesiastes 5:10

He loving silver shall not be satisfied with silver; and whoever loved not the increase with the multitude. Also this is vanity.

Ecclesiastes 6:3

If a man shall beget a hundred, and live many years, and a multitude shall be the days of his years, and his soul shall not be satisfied from good, and also there was no burial to him; I said, Good above him an abortion.

Matthew 6:25

For this I say to you, Be not anxious about your soul, what ye eat, and what ye drink; nor about your body, what ye put on. Is not the soul more than food, and the body than dress?

Luke 12:19

And I will say to my soul, Soul, thou hast many good things laid up for many years; rest, eat, drink, be gladdened.

John 6:27

Work not for food perishing, but food remaining to eternal life, which the Son of man will give you: for him God the Father sealed.

1 Timothy 6:6-8

But devotion with contentment is great gain.

Treasury of Scripture Knowledge

Summary

All the labour of man is for his mouth, and yet the appetite is not filled.

Bible References

The labour

Genesis 3:17
And to Adam he said, Because thou didst listen to the voice of thy wife, and thou wilt eat from the tree which I commanded thee, saying, Thou shalt not eat from it; cursed the earth for thy sake; in labor shalt thou eat of it all the days of thy life;
Proverbs 16:26
The soul of him laboring, labored for himself; for his mouth urged upon him.
Matthew 6:25
For this I say to you, Be not anxious about your soul, what ye eat, and what ye drink; nor about your body, what ye put on. Is not the soul more than food, and the body than dress?
John 6:27
Work not for food perishing, but food remaining to eternal life, which the Son of man will give you: for him God the Father sealed.
1 Timothy 6:6
But devotion with contentment is great gain.

Appetite

Ecclesiastes 6:3
If a man shall beget a hundred, and live many years, and a multitude shall be the days of his years, and his soul shall not be satisfied from good, and also there was no burial to him; I said, Good above him an abortion.
Ecclesiastes 5:10
He loving silver shall not be satisfied with silver; and whoever loved not the increase with the multitude. Also this is vanity.
Luke 12:19
And I will say to my soul, Soul, thou hast many good things laid up for many years; rest, eat, drink, be gladdened.