《资治通鉴·唐纪·唐纪二十八》
归降的突阙仆固都督勺磨以及跌部落人众散居在受降城周围，朔方大使王说他们暗地里勾结突阙，阴谋夺占唐军驻守的受降城，便密奏玄宗，请求将这些人诛杀。
突厥降户仆固都督勺磨及夹跌部落散居受降城侧，朔方大使王晙言其阴引突厥，谋陷军城，密奏请诛之。
The surrendered Bugutürquin general Shumo and his people were scattered around Shouxiangcheng. Wang Shuo, the military commissioner of Shaofang, suspected that they had secretly colluded with Bugutürquin and plotted to seize Shouxiangcheng from the Tang army. He secretly sent a memorial to Emperor Xuanzong, asking for these people to be killed.