《周书·本纪·卷四》
礼有随时通变的意义，下葬完毕，朝廷内外都除去丧服按照吉办事。
礼有通塞随时之义，葬讫，内外悉除服从吉。
The mourning rules should be adaptable to the changing times. After the burial, all officials inside and outside the royal court will change out of mourning attire and conduct auspicious ceremonies.