Answer:
What is eaten but not grown and was born in water but will disappear if soaked?
What hangs others yet can unintentionally hang itself?
What stays on the ground but never gets dirty?
The older they are the less wrinkles they have.
What is it which builds things up? Lays mountains low? Dries up lakes, and makes things grow? Cares not a whim about your passing? And is like few other things, because it is everlasting?
If you can spot one of these eastern warriors, it means they're not doing their job right.