Ecclesiastes 9:5-6, 10

For the living know that they will die; but the dead know nothing, and they no longer have a reward [here], for the memory of them is forgotten. Indeed their love, their hatred and their zeal have already perished, and they will no longer have a share [in this age] in anything that is done under the sun.

Whatever your hand finds to do, do it with all your might; for there is no activity or planning or knowledge or wisdom in Sheol (the nether world, the place of the dead) where you are going.