《汉书·传·外戚传下》
现在正赶上在皇极之月，后宫出现这种衰败之气，看来皇后姬妾没有能够怀孕而得以保全胎儿的，以明示皇室后继无人，卑贱之人将要兴起。
今正于皇极之月，兴废气于后宫，视后妾无能怀任保全者，以著继嗣之微，贱人将起也。
Now that it coincides with the month of Huangji, such signs of decay have appeared in the imperial harem, it seems that the empress and concubines have not been able to conceive and preserve fetuses, indicating that there is no heir to the royal family and that humble people are about to rise up.