《汉书·传·楚元王传》
当时多次有大灾异，刘向认为是外戚贵盛，王凤兄弟掌权的罪过。
时数有大异，向以为外戚贵盛，凤兄弟用事之咎。
At that time, there were many major disasters. Liu Xiang believed that it was the fault of the foreign relatives Wangfeng and his brothers who were in power.