《北史·列传·卷八十四》
太武帝因慕利延兄有擒获赫连定的功劳，派使者向他宣示晓谕，于是返回。
太武以利延兄有禽赫连定之功，遣使宣喻之，乃还。
Because Mu Liyan's brother had the merit of capturing Helian Ding, Emperor Taiwu sent envoys to show him the advice, so he returned.