《资治通鉴·唐纪·唐纪三十九》
正当此时，回纥和吐蕃听说仆固怀恩已经去世，便开始互争尊长，不相和睦，分别设置营帐居住，郭子仪知道了这件事。
是时，回纥与吐蕃闻仆固怀恩死，已争长，不相睦，分营而居，子仪知之。
Just then, the Huihe and Tubo heard that Pugu Huaien had died. They began to fight over who was the elder and became disharmonious. They set up separate encampments to live in. Guo Ziyi became aware of this.