宏智禪師廣錄 1.172

1.172

Ascending the hall, he cited: A monk asked Ruzu, "What are unspoken words?" / Ruzu said, "Where is your mouth?" / The monk said, "I have no mouth." / Ruzu said, "What do you usually eat meals with?" / The monk was speechless. Ruzu then struck him. / The master said, "He only knew how to hold a dead snake by the neck, but could not pluck the fierce tiger's whiskers. If at that time he had waited for him to ask, 'Where is your mouth?', and simply given a shout, flicked his sleeves, and walked away—even with Ruzu's full dynamic action, he would often have been unable to make a move in time."