《资治通鉴·唐纪·唐纪二十九》
打了十多天，吐蕃军队精疲力尽，仍然不能攻下常乐城，悉诺逻恭禄派人来劝降，贾师顺断然拒绝。
旬馀日，吐蕃力尽，不能克，使人说降之；不从。
 After more than ten days of fighting, the Tubo troops still had made no progress in conquering Changchengcheng, so Xinolu Gonglu sent an envoy to persuade them to surrender, but Jia Shishun flatly refused. 