《晋书·志·第二章》
凡五星之出现或隐没、留止或运行、违逆或顺从、迟缓或疾速应全历法时度的，就符合它的规律，政教全于常规；违反历法时度而迷失常道或缩时，就是乱行。
凡五星见伏、留行、逆顺、迟速应历度者，为得其行，政合于常；违历错度，而失路盈缩者，为乱行。
Whatever of the five planets, their appearing or disappearing, staying or moving, contrariwise or compliant, slow or fast, should conform to the full calendar timescale, when they are in accordance with its rules and the government is in regular order; if they violate the calendar timescale and go astray from the regular road, shortening the time, it’s random motion.