《北史·列传·卷一》
孝文帝病重时，对彭城王勰说： 后宫的那个人早就失去德行，自绝于天，我死后可以赐她自尽于别宫，葬以皇后的礼节，这样大概可以遮掩冯家的大过失。 
帝疾甚，谓彭城王勰曰： 后宫久乖阴德，自绝于天，吾死后可赐自尽别宫，葬以后礼，庶掩冯门之大过。 
When Emperor Xiaowen was seriously ill, he said to King Pengcheng Xie: The person in the harem has long lost his virtue and cut himself off from heaven. After my death, I can grant her suicide in a separate palace and bury her with the etiquette of the empress. This may be able to cover up the Feng family's major mistakes.