宏智禪師廣錄 4.184

4.184

上堂舉僧問雲門。不起一念還有過也無。門云。須彌山。師云。不起一念。向道須彌舌頭一臠肉。口唇兩邊皮。雲門得用妙如許。不落是非知不知。

Ascending the hall, [the Master] brought up: A monk asked Yunmen: "Does not giving rise to a single thought still have any fault?" Yunmen said: "Mount Sumeru."
The Master said: "Not giving rise to a single thought—he said 'Mount Sumeru.' A piece of meat on the tongue, two flaps of skin for lips. Yunmen's attainment of functioning was marvelous like this; he did not fall into right or wrong, knowing or not knowing."