《黄帝内经·素问·六元正纪大论》
灾变的卦象在北方一宫。司天之气为风化，五运生数为三，表示不及；年运之气为寒化，五运生数为一，表示不及；在泉之气为火化，五运成数为七，表示太过。
辛卯、辛酉岁：上阳明金，中少羽水运，下少阴火，雨化风化胜复同。邪气化度也。
The hexagram of the disaster is in the North Palace. The commanding sky is the climate, the five fortune-producing numbers are three, indicating insufficient; the annual fortune is the cold climate, the five fortune-producing numbers are one, indicating insufficient; the climate in the spring is the fire climate, and the five fortune-producing numbers are seven, indicating excessive.