《魏书·列传·卷六》
在这以前，别部将领李叔仁因拔陵逼近，请求迎接增援，元深赶赴前去，前后投降归附的有二十万人。
先是，别将李叔仁以拔陵来逼，请求迎援。深赴之，前后降附二十万人。
Prior to this, when Baling pressed forward, another general named Li Shuren sent a request for reinforcements, Yuan Shen rushed to his aid, and in the end, more than two hundred thousand people surrendered.