《北史·列传·卷二十九》
杨愔与尚书左仆射、平秦王高归彦、侍中燕子献、黄门侍郎郑子默受遗诏辅助朝政，并以为常山、长广二王威望较高，因而，他们对二王都存有猜忌之心。
愔与尚书左仆射平秦王归彦、侍中燕子献、黄门侍郎郑子默受遗诏辅政，并以二王威望先重，咸有猜忌之心。
Yang Yin and Shangshu Zuo Pushe, Pingqin Wang Gaoguiyan, Shizhong Yanzixian, and Huangmen Shilang Zheng Zimu were entrusted with assisting the court and believed that the two kings of Changshan and Changguang had high prestige, so they were suspicious of the two kings.