《汉书·传·谷永杜邺传》
希望陛下能够追溯观察夏、商、周、秦丧国的原因，来借鉴考察自己的行为。
愿陛下追观夏、商、周、秦所以失之，以镜考己行。
I hope that your Majesty will be able to trace and observe the reasons for the demise of Xia, Shang, Zhou, and Qin, and to learn from and examine your own behavior.