《韩非子·十过》
就召来师涓并告诉他说： 有人在弹奏新的乐调，叫人间近侍，都说不曾听见。
乃召师涓而告之，曰： 有鼓新声者，使人问左右，尽报弗闻。
Then he called over Shijuan and told him: Someone is playing a new musical tune, I had someone ask the attendants in my presence, but they all said that they hadn't heard it.