《礼记·檀弓下》
天子去世以后，第三天，祝首先手持丧杖；第五天，百官手持丧杖；第七天，瓷内的庶民穿上当穿的丧服；三月，诸侯及其大夫各服应服之服。
天子崩，三日祝先服，五日官长服，七日国中男女服，三月天下服。
After the emperor passed away, on the third day, Zhu held the mourning staff first; on the fifth day, all officials held the mourning staff; on the seventh day, the common people in the city wore mourning clothes; on the third month, the feudal lords and their officials wore the appropriate mourning clothes.