《北史·列传·卷十一》
太武帝攻打赫连昌时，命令于栗石单跟宋兵将军周几领兵袭击陕州城，两人统率的军队长驱直入，攻至三辅之地。
太武之征赫连昌，敕栗磾与宋兵将军周几袭陕城，长驱至三辅。
When Emperor Taiwu attacked Helan Chang, he ordered Yu Lishi and the Song general Zhou Ji to lead troops to attack Shaanxi, and the two led their troops to drive straight in and attack the three auxiliary forces.