Job 15:33

33 Like a vine he will let his sour grapes fall, ^{▼▼ The verb means “to treat violently” or “to wrong.” It indicates that the vine did not nourish the grapes well enough for them to grow, and so they dry up and drop off.}
and like an olive tree
he will shed his blossoms. ^{▼▼ The point is that like the tree the wicked man shows signs of life but produces nothing valuable. The olive tree will have blossoms in the years that it produces no olives, and so eventually drops the blossoms.}