雲門匡真禪師廣錄 2.37

2.37

舉：「《參同契》云：『回互不回互。』」師云：「作麼生是不回互？」乃以手指板頭云：「者箇是板頭，作麼生是回互？」師云：「喚什麼作板頭？」

He cited: "The Cantongqi says: 'Interpenetration and non-interpenetration.'" The Master said, "What is non-interpenetration?" He then pointed with his finger at the end of the wooden bench and said, "This is the end of the bench. What is interpenetration?" The Master said, "What do you call the end of the bench?"