《宋书·志·卷十七》
谨命三公九卿各部门官员，深深以前代为鉴戒后嗣之中万一有人是由诸侯支子入继大统，那么就应当深明为人后嗣的大义。
其令公卿有司，深以前代为诫。后嗣万一有由诸侯入奉大统，则当明为人后之义。
We hereby order the officials of the three princes and the nine ministers to take the past as a warning. Among the successors, if one is a descendant of the princes, then he should deeply understand the meaning of being a successor.