《新唐书·本纪·卷六·肃宗 代宗》
天宝十五载，玄宗躲避叛贼，走到马嵬坡，父老乡亲拦路请求留下太子李亨讨伐叛贼，玄宗应允，派寿王李瑁与内侍高力士传谕太子，李亨于是回转返还。
十五载，玄宗避贼，行至马嵬，父老遮道请留太子讨贼，玄宗许之，遣寿王瑁及内侍高力士谕太子，太子乃还。
During the 15th year of the reign of Emperor Xuanzong of the Tang, Emperor Xuanzong was escaping from the rebels and had arrived at Mawei Slope when the elderly from his hometown blocked his path and requested that he leave Crown Prince Li Heng behind to fight against the rebels. Emperor Xuanzong agreed and sent Prince Shou Li Mao and the eunuch Gao Lishi to relay the message to the Crown Prince. Li Heng thus turned around and went back.