《资治通鉴·唐纪·唐纪四十》
等到仆因怀恩去世，吐蕃逃走，后来回纥惧怕了，便向唐朝请求和解，我们唐朝并不忘记你们以前的功劳，给你们不少恩惠，放你们回去。
及怀恩死，吐蕃走，然后回纥惧而请和，我唐不忘前功，加惠而纵之。
Until Pugu Huaien died and Tibet escaped, the Uyghurs became scared and requested reconciliation with the Tang Dynasty. We the Tang Dynasty did not forget your past contributions and gave you many benefactions and let you go back.