《魏书·列传·卷七》
四代后而鳃服完结，五代后而袒衣免冠，六代以后亲属关系竭尽。
四世而缌服穷，五世而袒免，六世而亲属竭矣。
After four generations the succession of mourning clothes comes to an end, after five generations the mourning band and cap are dispensed with, and after six generations the kinship is exhausted.