《北史·列传·卷八十》
韩凤的母亲鲜于，是段孝言姨母儿子的姐姐，因此不合理地攀比，上奏请求监造晋阳宫。
凤母鲜于，段孝言之从母子姊也，为此偏相参附，奏遣监造晋阳宫。
Han Feng’s mother Xian Yu was the older sister of Duan Xiaoyan’s cousin’s nephew, so he took advantage of this connection to make an unreasonable request to the Emperor, to oversee the construction of the Jinyang Palace.