《北史·列传·卷二十二》
太和十四年，尚书李冲上奏孝文帝说，刘延明原是河西的大儒，可是如今子孙沉沦下层，没有禄位，像这样贤人的子孙，理应受到格外恩遇。
太和十四年，尚书李冲奏：延明河右硕儒，今子孙沈屈，未有禄润；贤者子孙，宜蒙显异。
In the fourteenth year of Taihe, Shangshu Li Chong said in a memorial to Emperor Xiaowen that Liu Yanming was originally a great Confucian scholar in Hexi, but now his descendants live in poverty, without official positions. The descendants of virtuous people like him should be treated with special favor.