《周书·列传·卷十》
字文广因为晋公宇文护长时间独揽大权，就劝他减少权势，宇文护没有采纳。
广以晋公护久擅威权，劝令挹损，护不能纳。
Yuwen Guang, seeing that the Duke of Jin, Yuwen Hu, had for a long time monopolized the power, advised him to reduce his powers, but Yuwen Hu did not listen.