Ecclesiastes 3:19–21

19 For the fate of the children of Adam and the fate of animals is the same.i As one dies, so dies the other; they all have the same breath. People have no advantage over animals since everything is futile. 20 All are going to the same place; all come from dust, and all return to dust.j 21 Who knows if the spirits of the children of Adam go upward and the spirits of animals go downward to the earth?