《宋书·本纪·卷三》
凡有户籍以及责罚仅一人的，不再牵连其亲属，以免互相牵连。 
其有户统及谪止一身者，不得复侵滥服亲，以相连染。 
If there is only one person with a registered permanent residence and who is punished, the relatives will no longer be implicated to avoid mutual implication.