萬松老人評唱天童覺和尚頌古從容庵錄 2.18

2.18

舉。僧問雲門。不起一念還有過也。無（言清行濁漢）門云。須彌山（險）。

Case: A monk asked Yunmen, 'When not a single thought arises, is there still any fault or not?' (A fellow whose speech is clear but whose action is murky.) Yunmen said, 'Mount Sumeru.' (Steep!)