《史记·七十列传·范雎蔡泽列传》
可是范雎发觉谈话时周围有不少偷听的人，心里惶惑不安，不敢谈宫廷内部太后专权的事，就先谈穰侯对诸侯国的外交谋略，借以观察一下秦王的态度。
然左右多窃听者，范雎恐，未敢言内，先言外事，以观秦王之俯仰。
However, Fan Sui found that there were many eavesdroppers around him when he was talking, and he was a little flustered and did not dare to talk about the Queen Mother's authority in the palace. He first talked about Ranghou's diplomatic strategy towards the vassal states in order to observe King Qin's attitude.