Ecclesiastes 5:18-20

Then I realized that it is good and proper for a man to eat and drink, and to find satisfaction in his toilsome labor under the sun during the few days of life God has given him--for this is his lot. Moreover, when God gives any man wealth and possessions, and enables him to enjoy them, to accept his lot and be happy in his work--this is a gift from God. He seldom reflects on the days of his life, because God keeps him occupied with gladness of heart.

it is good and proper for a man to eat and drink
Ecclesiastes 2:3 I tried cheering myself with wine, and embracing folly--my mind still guiding me with wisdom. I wanted to see what was worthwhile for men to do under heaven the few days of their lives.

to find satisfaction in his toilsome labor
Ecclesiastes 2:10 I denied myself nothing my eyes desired; I refused my heart no pleasure. My heart took delight in all my work, and this was the reward for all my labor.
Ecclesiastes 2:24-25 A man can do nothing better than to eat and drink and find satisfaction in his work. This too, I see, is from the hand of God, for without him, who can eat or find enjoyment?

when God gives any man wealth and possessions
1 Chronicles 29:12 "Wealth and honor come from you; you are the ruler of all things. In your hands are strength and power to exalt and give strength to all."

and enables him to enjoy them
Ecclesiastes 6:2 God gives a man wealth, possessions and honor, so that he lacks nothing his heart desires, but God does not enable him to enjoy them and a stranger enjoys them instead. This is meaningless, a grievous evil.

this is a gift from God
Ecclesiastes 2:24 (see above)

NOTES:
Ecclesiastes 3:12-14 I know that there is nothing better for men than to be happy and do good while they live. That everyone may eat and drink, and find satisfaction in all his toil--this is the gift of God. I know that everything God does will endure forever; nothing can be added to it and nothing taken from it. God does it so that men will revere him.
Ecclesiastes 8:15 So I commend the enjoyment of life, because nothing is better for a man under the sun than to eat and drink and be glad. Then joy will accompany him in his work all the days of the life God has given him under the sun.
Ecclesiastes 9:7 Go, eat your food with gladness, and drink your wine with joyful heart, for it is now that God favors what you do.
Ecclesiastes 12:13 Now all has been heard; here is the conclusion of the matter: Fear God and keep his commandments, for this is the whole duty of man.

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984 by International Bible Society. Used by permission. All rights reserved worldwide.