雲門匡真禪師廣錄 3.65

3.65

Because a monk was standing in front of him, the Master struck him once with his staff. The monk turned his head, and the Master reached out his hand, saying, "Bring money!"
There was no reply.
Answering on their behalf, [the Master] said, "If one does not turn one's head, how can one know what follows?"
He also said, "Just spit right in his face."