'Reward' in the Bible

I neither withheld anything from my eyes that they desired, nor did I deprive any pleasure from my heart. My heart rejoiced in all my toil, for this was my reward from all my toil.

For although a person may toil with great wisdom and skill, he must leave his reward to someone who has not toiled for it. This also [is] vanity and a great calamity.

Two [are] better than the one, for they enjoy a better reward for their toil.

For the living know that they will die, but the dead do not know anything. They no longer have a reward, and even the memory of them is forgotten.