《资治通鉴·晋纪·晋纪十五》
太傅李骧、司徒王达劝谏说： 先王们之所以必定从自己的儿子中选立继承人，为的是彰明固定不变的分位，防止篡权夺位。
太傅骧、司徒王达谏曰： 先王立嗣必子者，所以明定分而防篡夺也。
The Grand Preceptor Li Xiang and the Minister of State Wang Da remonstrated saying: The reason that the former kings invariably chose their heirs from among their own sons was to make the succession clear and stable, and prevent the throne being usurped.