《后汉书·本纪·孝顺孝冲孝质帝纪》
郡国有名山大泽能兴云致雨的，二千石长吏都洁身斋戒进行祭祷，务必虔诚尽礼。
郡国有名山大泽能兴云雨者，二千石长吏各洁齐请祷，谒诚尽礼。
For famous mountains and lakes in prefectures and states that can bring about clouds and rain, the 2,000 stone officers all purified themselves, abstained from meat, and prayed, making sure to be pious and respectful in their ceremonies.