《周书·本纪·卷二》
最初，魏帝打算驾幸洛阳祭祀陵园，恰好独孤信被围，诏令太祖率军援救独孤信，魏帝也随军东去。
先是，魏帝将幸洛阳拜园陵，会信被围，诏太祖率军救信，魏帝亦东。
At first, Emperor Wei planned to travel to Luoyang to worship the mausoleum. Duguxin happened to be under siege, so he ordered Emperor Taizu to lead troops to his aid, and he also travelled east with the army.