《北史·列传·卷九》
昭成帝晚年时，几个部落内发生内乱，苻坚让刘库仁管理国家大事，长孙嵩和元他等人率领部众归附他。
弱冠为通直郎，稍迁著作郎。
When Emperor Zhaocheng was in his late years, civil strife occurred within several tribes; Fu Jian had Liu Kuren administer the affairs of state, and Changsun Song, Yuan Ta and other people led their followers to submit to him.