《魏书·列传·卷七》
统领兵马蓄养精锐，观察裂痕窥伺嫌隙，如果他们凋败的形势已经昭彰，懈怠的局面已经明显，就可以顺流而下摧折他们的锋芒，长驱直入席卷南方。 
总兵伫锐，观衅伺隙，若其零落之形已彰，怠懈之势已著，便可顺流摧锋，长驱席卷。 
Command the troops to strengthen their morale, observe the gaps and spot the flaws. If their decline has become apparent and their slackness has become evident, it will be possible to follow the current and break their momentum, and sweep through the south.