《淮南子·天文训》
这一年是卯在乙名叫旃蒙。又如岁名叫执徐的年份，春季旱、秋季涝，这样造成小的饥荒；同时蚕又孵化不出，而麦子倒成熟，百姓口粮有三升。
卯在乙曰旃蒙，执徐之岁，岁早旱晚水，小饥，蚕闭，麦熟，民食三升。
This year is Mao in Yi and is called Zhenmeng. For example, the year is named Zhi Xu. There is a drought in spring and floods in autumn, resulting in a small famine. At the same time, the silkworm cannot hatch, but the wheat matures, and the people have three liters of food.