《资治通鉴·唐纪·唐纪六十四》
又将《贞观政要》书写于屏风之上，经常严肃地拱手细读其中的警句。
又书《贞观政要》于屏风，每正色拱手而读之。
He also wrote Essentials for Governance during the Zhenguan Reign on a folding screen and often read its admonitions seriously with hands cupped together.