《新唐书·列传·卷一百四十九》
但仆固怀恩怏怏不乐，个性又固执刚强，不肯因谗言诬毁而违心，无法自我解脱，于是上书陈述： 臣世代本是夷人，年轻时恩蒙上皇驱策。
然怀恩怏怏，又性强固，不肯为谗毁屈，无以自解，乃上书陈情曰： 臣世本夷人，少蒙上皇驱策。
However, Pugu Huaien was depressed and unhappy, was also stubborn and unyielding, and was unwilling to go against his conscience because of slander and slander. He couldn't free himself, so he wrote a letter stating: I am a barbarian by birth. When I was young, I was driven to conquer by the late emperor.