Ecclesiastes 1:8
"All things are full of labour; man cannot utter it: the eye is not satisfied with seeing, nor the ear filled with hearing."
Cross References (ranked by relevance)
Hell and destruction are never full; so the eyes of man are never satisfied.
Come unto me, all ye that labour and are heavy laden, and I will give you rest.
There is one alone, and there is not a second; yea, he hath neither child nor brother: yet is there no end of all his labour; neither is his eye satisfied with riches; neither saith he, For whom do I labour, and bereave my soul of good? This is also vanity, yea, it is a sore travail.
My soul shall be satisfied as with marrow and fatness; and my mouth shall praise thee with joyful lips:
Then I looked on all the works that my hands had wrought, and on the labour that I had laboured to do: and, behold, all was vanity and vexation of spirit, and there was no profit under the sun.
Blessed are they which do hunger and thirst after righteousness: for they shall be filled.
For God giveth to a man that is good in his sight wisdom, and knowledge, and joy: but to the sinner he giveth travail, to gather and to heap up, that he may give to him that is good before God. This also is vanity and vexation of spirit.