《隋书·列传·卷十五》
当初，高祖还没有登基的时候，曾经和宇文庆闲谈天下大事，高祖对宇文庆说： 天元帝没有积什么德，以面相来看他的寿命也不会长，再加上他的法令制度条款又多又苛刻，他又纵情声色，依我看来，他的皇位大概不会长久。
初，上潜龙时，尝从容与庆言及天下事，上谓庆曰： 天元实无积德，视其相貌，寿亦不长。加以法令繁苛，耽恣声色，以吾观之，殆将不久。
In the beginning, when Gaozu had not yet ascended to the throne, he once talked with Yuwen Qing about the major events in the world. Gaozu said to Yuwen Qing, "Emperor Tianyuan has not accumulated any virtue, and his life span will not be long in light of his physiognomy. In addition, his laws and regulations are numerous and harsh, and he indulges in sensual pleasures. In my opinion, his throne will probably not last long.