《北齐书·本纪·卷四》
上观览唐、虞，下考察魏、晋，没有不是先于天时禅让帝位，考虑天命授位的时间归于终结。
上览唐、虞，下稽魏、晋，莫不先天揖让，考历终归。
I looked up to the instances of Yao and Shun, and looked down to those of the Wei and the Jin; there was none who did not early follow the precedent of yielding the throne to him who had received the commission of Heaven; and I now that the time has come for me to end.