《淮南子·精神训》
夏禹到南方巡视，渡过长江时，一条黄龙游出水面并将夏禹他们所乘坐的船托起，船上的人都吓得神色大变，可禹却恬然地笑着说： 我受命于天，竭尽全力为百姓操劳。我活着是寄寓天地之间，死后是回归自然大地。
禹南省方，济于江，黄龙负舟，舟中之人五色无主，禹乃熙笑而称曰： 我受命于天，竭力而劳万民，生寄也，死归也，何足以滑和？ 
When Xia Yu was on an inspection in the south, when he crossed the Yangtze River, a yellow dragon swam out of the water and lifted the boat that Xia Yu and others were in, and the people on the boat were so scared that their expressions changed drastically, but Yu smiled calmly and said: I was entrusted by heaven to do my best to take care of the people. I live in the world, and I return to the nature after death.