《明史·列传·卷一百七十七》
他们激励祯说 ：公为国出力，肯再带兵出战否？ 祯立即答应，曹、柴二人假称愿为祯左右手。
指挥曹能、柴成与同知比，激祯曰： 公为国出力，肯复行乎？ 祯即请往，两人伪许相左右。
They encouraged Zhen by saying: "Sir, you have served the country with distinction. Are you willing to lead troops into battle once again?" Zhen immediately agreed, and Cao and Chai falsely claimed that they were willing to serve as Zhen's left and right-hand men.