《宋书·列传·卷九十五》
赫连定率兵向东扫击。接着又攻下长安。拓跋焘又亲自征讨，但不能攻下赫连定，于是分出部分兵力戍守大城而归。
定率众东还，后克长安，焘又自攻不克，乃分军戍大城而还。
Helan Ding led his troops eastward and conquered Chang'an again. Tuoba Tao personally led an expedition again, but failed to defeat Helan Ding, so he had to divide his troops to garrison the main city and return.