《资治通鉴·唐纪·唐纪十八》
现今波斯王已死，他儿子泥洹师作为人质还留在京师长安，应该派遣使者送他回国，在途经阿史那都支和李庶匐统治区时，见机行事袭取他们，可以不经激战而将他们擒获。 
今波斯王卒，其子泥洹师为质在京师，宜遣使者送归国，道过二虏，以便宜取之，可不血刃而擒也。 
“Now that the King of Persia is dead and his son, Nihuan Shi, is still in the capital city of Chang’an as a hostage, we should send an envoy to escort him back to his country. When the envoy passes through the areas controlled by Ashina Duzhi and Li Shufu, we can take the opportunity to attack them to capture these guys without a fierce battle.”