Ecclesiastes 4:8
"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."
Cross References (ranked by relevance)
Hell and destruction are never full; so the eyes of man are never satisfied.
But God said unto him, Thou fool, this night thy soul shall be required of thee: then whose shall those things be, which thou hast provided?
All things are full of labour; man cannot utter it: the eye is not satisfied with seeing, nor the ear filled with hearing.
And I gave my heart to seek and search out by wisdom concerning all things that are done under heaven: this sore travail hath God given to the sons of man to be exercised therewith.
Come unto me, all ye that labour and are heavy laden, and I will give you rest.
And the LORD God said, It is not good that the man should be alone; I will make him an help meet for him.
Surely every man walketh in a vain shew: surely they are disquieted in vain: he heapeth up riches, and knoweth not who shall gather them.
He that loveth silver shall not be satisfied with silver; nor he that loveth abundance with increase: this is also vanity.
Woe unto them that join house to house, that lay field to field, till there be no place, that they may be placed alone in the midst of the earth!
Wherefore do ye spend money for that which is not bread? and your labour for that which satisfieth not? hearken diligently unto me, and eat ye that which is good, and let your soul delight itself in fatness.
For all his days are sorrows, and his travail grief; yea, his heart taketh not rest in the night. This is also vanity.