《北史·列传·卷一》
文明太皇太后想要让娘家一门代代显贵受宠，便挑选了冯熙的两个女儿一起进入皇宫，这时，幽皇后只有十四岁。
文明太皇太后欲家世贵宠，乃简熙二女，俱入掖庭，时年十四。
The Civilized Grand Empress Dowager wanted her mother's family to be honored from generation to generation, so she selected Feng Xi's two daughters to enter the palace together. At that time, Empress You was only fourteen years old.