《晋书·志·第十章》
仓曹属卫恒议道： 有人说，正妻不能有两个，前妻应被绝弃。
仓曹属卫恆议： 或云，嫡不可二，前妻宜绝。
At the granary, Cao belonged to Wei Heng's discussion project: There were people who said that the main wife should not have two, the former wife had to be abandoned.