《礼记·文王世子》
族人之间的互相往来，应该吊唁的不去吊唁，应该戴免的不戴免，有关官员将给予处罚。
族之相为也，宜吊不吊，宜免不免，有司罚之。
The clansmen should visit each other when they should, and wear mourning clothes when they should. If they do not, the officials will punish them.