《晋书·帝纪·第三章》
二十五日，下诏说： 嫡长与庶亲的差别，是为了区别上下，分清贵贱。
丁亥，诏曰： 嫡庶之别，所以辨上下，明贵贱。
On the 25th, an edict was issued stating that the difference between a legitimate eldest son and a collateral relative was in order to distinguish the superior from the inferior and the noble from the humble.