《管子·水地》
所以，数百年的涸泽，而山谷没有移位，水源没有断绝的地方，就要产生庆忌。
故涸泽数百岁，谷之不徙，水之不绝者，生庆忌。
Therefore, after hundreds of years of drought, in places where mountains and valleys have not shifted and springs have not dried up, Qingji will be born.