《北史·列传·卷六十》
因此各统一日，其余的按次序运行，所当之日自己为宫，商徵因类相从。 
故各统一日。其余以次运行，当日者各自为宫，而商徵以类从焉。 
Therefore, each day is united, and the rest move in order, the self is the Gong on the day, and the Shang and Zhi follow suit.