《战国策·东周·严氏为贼》
有人对东周君说： 您就直截了当、毫不隐讳地对韩国使臣说： 我本来是知道阳竖参与了严遂的谋杀事件的，所以把他留了十四天，等待贵国的指示。
客谓周君曰： 正语之曰： 寡人知严氏之为贼，而阳竖与之，故留之十四日以待命也。
Someone said to the Lord of Dong Zhou: "You should be straightforward and open with the Han envoy: I knew that Yang Shu was involved in Yan Sui's assassination, so I kept him for fourteen days, waiting for instructions from your country."