《魏书·列传·卷二》
元丕说： 陛下去年亲自统率六军讨伐萧氏，到达洛阳，派遣任城王丞逻宣布旨意，命臣下等人商议在盗阻建都。
丕曰： 陛下去岁亲御六军讨萧氏，至洛，遣任城王澄宣旨，敕臣等议都洛。
Yuan Pi said: Last year, Your Majesty personally led the six armies to讨伐 the Xiao clan, and after reaching Luoyang, sent the Chengwang Chengluo to announce the edict, ordering the ministers to discuss the building of a capital in Duozhi.