《资治通鉴·齐纪·齐纪三》
北魏冀州刺史、咸阳王拓跋禧朝见孝文帝，有关部门上奏说： 冀州三千老百姓，一致称赞拓跋禧清廉公正，施行德政，请求陛下允许他世代承袭冀州刺史的官职。 
魏冀州刺史咸阳王禧入朝。有司奏： 冀州民三千人称禧清明有惠政，请世胙冀州。 
Tuoba Xi, the Governor of Jizhou Prefecture and King of Xianyang of Northern Wei, paid an audience to Emperor Xiaowen. The relevant department submitted a memorial, stating: 30,000 civilians in Jizhou all praised Tuoba Xi for his integrity, fairness, and enforcement of virtuous governance, and requested His Majesty to allow him to inherit the post of Governor of Jizhou Prefecture through generations.