《论衡·卷五·感虚篇》
洪水成灾比黄河堵塞更凶，尧为此发愁比晋景公厉害，但没有听见用穿丧服，通过哭泣声的手段能制服洪水的。
水变甚於河壅，尧忧深於景公，不闻以素缟哭泣之声能厌胜之。
The flood disaster was far more devastating than the blockade of the Yellow River. Emperor Yao was more worried than Duke Jing of Jin. However, I have never heard of anyone using the method of wearing mourning clothes and sobbing to subdue the flood.