《魏书·列传·卷九》
于忠在门下省掌权，并且担任宰辅，又总管宫廷军队，任崇训宫卫尉，身兼内外职务，蛮横干预宫中事情。
忠秉权门下，且居宰执，又总禁旅，为崇训卫尉，身兼内外，横干宫掖。
Yu Zhong was in charge of the right and the left, and also acted as prime minister. In addition, he was in charge of the palace military, Ren Chongxun was a personal bodyguard, he held positions both inside and outside the palace, and he ruthlessly interfered with the events in the palace.