《资治通鉴·唐纪·唐纪八》
正赶上天下大雪，雪深达数尺，羊、马多冻死，百姓饥寒交迫，颉利可汗担心大唐帝国乘突厥衰败进兵，于是带领兵马到朔州边境，扬言要会猎，实际上是防备唐朝。
会大雪，平地数尺，羊马多死，民大饥，颉利恐唐乘其弊，引兵入朔州境上，扬言会猎，实设备焉。
Just as a heavy snow fell across the country, the snow was several feet deep, and many sheep and horses froze to death. The people were starving and freezing. Jieli Khan was worried that the Tang Empire would take advantage of the Tujue's decline and send troops, so he led his army to the border of Suozhou and declared that he would hunt, but in fact, it was to defend against the Tang.