《后汉书·列传·西域传》
天子就逭件事向大司空宝融询问，窦融认为贤父子兄弟相互约定侍奉汉朝，又十分诚恳，最好给他加上官位使其安心。
天子以问大司空窦融，以为贤父子兄弟相约事汉，款诚又至，宜加号位以镇安之。
The emperor consulted the grand minister, Bao Rong, regarding this matter. Dou Rong believed that Xian and his father and brothers had mutually agreed to serve the Han Dynasty and were very sincere, so it would be best to grant him an official position to set his mind at ease.