Ecclesiastes 6:7

All the labor of man is for his mouth, And yet the soul is not satisfied.

Surrounding context

6:6 even if he lives a thousand years twice--but has not seen goodness. Do not all go to one place?

6:7 All the labor of man is for his mouth, And yet the soul is not satisfied.

6:8 For what more has the wise man than the fool? What does the poor man have, Who knows how to walk before the living?

Translation and sources