《资治通鉴·唐纪·唐纪二十九》
从此，吐蕃逐渐衰落。十二月，戊寅，唐玄宗下令说，由于吐蕃成为边境的祸害，特派陇右道各军以及各军征集的当地民兵五万六千人，河西道各军以及各军征集的当地民兵四万人，又征调关中兵一万人集中在临洮，朔方兵士一万人集中到会州以预防吐蕃乘秋日马肥时大举入侵。到了初冬，如没有敌人侵犯就罢兵；如侦察到敌人入侵，就交替出兵，从腹背两面夹击敌人。
十二月，戊寅，制以吐蕃为边患，令陇右道及诸军团兵五万六千人，河西道及诸军团兵四万人，又征关中兵万人集临洮，朔方兵二万人集会州防秋，至冬初，无寇而罢；伺虏入寇，互出兵腹背击之。
Since then, Tubo has gradually declined. On December 15th, Wuyin, Emperor Xuanzong of Tang gave an order, because Tubo has become a disaster in the border, he specially sent the troops along the Longyou Road and the 56,000 local militias recruited by the troops, and the troops along the Hexi Road and the 40,000 local militias recruited by the troops. In addition, 10,000 troops from Guanzhong were concentrated in Lintao, and 10,000 soldiers from Shufang were concentrated in Huizhou to prevent Tubo from invading on a large scale when the horses were fat in autumn. If there is no enemy invasion in the early winter, the troops will be dismissed; if the enemy invasion is detected, the troops will be sent out alternately, attacking the enemy from both front and back.