Guishan asked Yangshan, “Where have you come from?”
  Yangshan replied, “I’ve come from the fields.”
  “How many people are in the fields?”
  Yangshan planted his hoe in the ground and stood with his hands clasped.
  Guishan said, “Lots of people are cutting water mallows on South Mountain.”
  Yangshan picked up his hoe and left.

Book of Serenity, Case 15