《后汉书·列传·郑范陈贾张列传》
帝曾经问郑兴郊祀的事，并说： 我想用谶言断定，怎么样？ 
帝尝问兴郊祀事，曰： 吾欲以谶断之，何如？ 
The emperor once asked Zheng Xing about the affairs of the ancestral temple and said, "I want to use the prophecy to make a judgment. How about that?"