Answer:
What get wet while drying
A harvest sown and reaped on the same day In an unplowed field, Which increases without growing, Remains whole though it is eaten Within and without, Is useless and yet The staple of nations.
You heard me before, yet you hear me again, then I die. Until you call me again.
Weight in my belly, Trees on my back, I travel fast in my place, but feet is a feature I lack
Feed me and I live, give me drink and I die.
What never gets any wetter no matter how hard it rains?