《管子·轻重丁》
桓公祭神完毕，管仲向桓公报告说： 地震是瘟疫的先兆。国家会发生不幸。
桓公终神，管子入复桓公曰： 地重，投之哉兆，国有恸。
After Duke Huan had finished offering sacrifices, Guan Zhong reported to him, saying, “Earthquakes are the harbingers of plagues. The country will experience calamity.”