Case 20: Suibi and the Chin Rest

Ryuge asked Suibi,
  "What is the meaning of the Patriarch's coming from the west?"
Suibi said,
  "Bring me a chin rest."
Ryuge brought one and gave it to him. Suibi took it and hit him. 
Ryuge said,
  "You may hit me as you like. After all there is no meaning to the
   Patriarch's coming from the west."

Ryuge also asked Rinzai,
  "What is the meaning of the Patriarch's coming from the west?"
Rinzai said,
  "Bring me a sitting cushion."
Ryuge got one and gave it to Rinzai. Rinzai took it and hit him. Ryuge said,
  "You may hit me as you like. After all there is no meaning to the
   Patriarch's coming from the west."

[1] Literally: "Zen board" i.e. a narrow board used so as to let one sleep in
    the sitting posture.