Shoyoroku - Case 80: Suibi and the Chin Rest [1]

Ryuge asked Suibi, 
  "What is the meaning of the Patriarch's coming from the west?"
Suibi said, 
  "Bring me a chin rest [2]."
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,a
  "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."

Later Ryuge became abbot of a temple. A monk asked him,
  "Master, at that time, when you asked Suibi and Rinzai about the meaning
   of the Patriarch's coming from the west, did they clarify it or not?"
Ryuge said,
  "They clarified it all right. After all, there is no meaning to the
   Patriarch's coming from the west."

[1]: similar to case 20 of Hekiganroku. However, the third paragraph, is
     peculiar to the Shoyoroku.
[2]: Literally: "Zen board." A narrow board used so as to let one sleep in
     the sitting posture.