《汉书·志·五行志中之上》
刘向认为这事近乎青祥，也是牛祸，是因为不敬而无知所导致的。
刘向以为，近青祥，亦牛祸也，不敬而之所致也。
Liu Xiang believed that these events were auspicious omens, and also bovine misfortunes, which were caused by irreverence and ignorance.