In the district of Zhaozhou, an old woman sent a message to the master [Zen Master Zhouzhou] with a donation and a request that he recite the entire collection of Buddhist sutras.
Hearing of this, the master stepped down from his seat and walked around the chair one time. Then he said, "I have finished reciting the collection of sutras."
The messenger returned to the old woman and told her what happened with Zhouzhou. The old woman said, "I asked Zhaozhou to recite the complete collection of sutras. Why did he recite only half the sutras?"
Commentary
Should Zhaozhou have walked twice around the chair?
Source: Opening a Mountain by Steven Heine