《北史·列传·卷四》
太武帝大怒，准备讨伐，丕上表说，和龙新平定，应当恢复生产，让民众广修农田耕种，以增加军需物资，然后进讨，可以一举歼灭。
太武怒，将讨之。丕上疏以为和龙新定，宜复之，使广修农殖，以饶军实，然后进图，可一举而灭。
Emperor Taiwu was furious, and prepared to attack. Pi submitted a memorial saying, Helong had just been pacified and production should be restored. People should expand the farmland and cultivate the land to increase military supplies, and then advance. This will enable us to annihilate them all in one battle.