《资治通鉴·汉纪·汉纪三十七》
开始预建皇陵。明帝下令： 修建陵墓，只要使水能够流淌出去而已，不许堆高坟丘。
初作寿陵，制： 令流水而已，无得起坟。
The construction of the imperial mausoleum started. Emperor Ming ordered that: “When constructing the mausoleum, just make sure the water can run out. Do not build a high burial mound.