《旧唐书·列传·卷一百零九》
人们皆认为天宝十五年安禄山自范阳起兵，是治乱之分界，臣认为开元二十年罢免贤相张九龄，专任奸臣李林甫，治乱自此已划分。
人皆以天宝十五年禄山自范阳起兵，是理乱分时，臣以为开元二十年罢贤相张九龄，专任奸臣李林甫，理乱自此已分矣。
People all believe that it was when An Lushan raised the army from Fanyang in the fifteenth year of Tianbao that the division between good governance and chaos occurred. I believe that when the good prime minister Zhang Jiuling was dismissed in the twentieth year of Kaiyuan and the traitor Li Linfu was solely employed, that was the division between good governance and chaos.