《北史·列传·卷三十八》
裴伯茂与他同在中书省供职，常常轻侮他，因他的皮肤颜色黑，所以喊他 黑宇 。
裴伯茂与之同省，常侮忽之，以忠之色黑，呼为 黑宇 。
Pei Bomu, who was in the same department in the Zhongshu Province, often treated him with contempt, and because of his dark complexion, called him "Black Yuwenshizhi".