《旧唐书·本纪·卷十七》
十五日，以左神策大将军、主持军队工作的李泳为单于都护，并充任振武、麟、胜节度使。
甲戌，以左神策军、知军事李泳为单于都护，充振武、麟胜节度使。
On the fifteenth day, Li Yong, the General of the Left Shence Army and the person in charge of the army, was appointed as the Duhu of Chanyu and concurrently as the Jiedushi of Zhenwu, Lin, and Sheng.