《新唐书·列传·卷四》
后逢突厥酋帅郁射设进围乌城，建成推荐元吉领兵北讨，还引荐秦王府骁将秦叔宝、尉迟敬德、程知节、段志玄等多人全都同行，又将秦王府精兵并入其府。
突厥郁射设入围乌城，建成荐元吉北讨，乃多引秦王府骁将秦叔宝、尉迟敬德、程知节、段志玄与行，又籍秦府精兵益麾下。
Later, when the Turkic chieftain Yushishe besieged Wucheng, Jiancheng recommended Yuanji to lead the army to the north to quell the rebellion, and also introduced Qin王府 warriors Qin Shubao, Yuchi Jingde, Cheng Zhijie, Duan Zhixuan and many others to go with him, and also transferred Qin王府's elite soldiers to his mansion.