《北史·本记·卷七》
武成帝在位时，祖受到重用，便对武成帝说 ：文宣帝十分残暴，怎么能够称为 文 ？
及武成时，珽被任遇，乃说武成曰： 文宣甚暴，何得称文？
When Emperor Wucheng was in power, Zu was heavily used, so he said to Emperor Wucheng: "Emperor Wuxuan was very violent, how could he be called "Wen"?