《资治通鉴·唐纪·唐纪四十二》
当初，左仆射刘晏担任吏部尚书，杨炎担任侍郎，两不悦服。
初，左仆射刘晏为吏部尚书，杨炎为侍郎，不相悦。
At the beginning, the Zuo Pushe Liu An served as the Minister of the Ministry of Officials, and Yang Yan served as the attendant, and the two were not happy.