《旧唐书·列传·卷一百零九》
玄宗用姚崇、宋王景、张九龄、韩休、李元、杜暹则治，用李林甫、杨国忠则乱。
玄宗用姚崇、宋璟、张九龄、韩休、李元纮、杜暹则理；用林甫、杨国忠则乱。
When Emperor Xuanzong employed Yao Chong, Song Wangjing, Zhang Jiuling, Han Xiu, Li Yuan and Du Xiyan, the country was well-governed. When he employed Li Linfu and Yang Guozhong, the country was in chaos.