《北史·列传·卷四十三》
又命他陈述为政中需要注意的地方，杜弼说： 天下最重要的事情，都不超过处罚和奖赏两种。
又令陈政要可为鉴诫者，弼曰： 天下大务，莫过刑赏二端。
He asked him to state the things he should pay attention to in governance, and Du Bi said: The most important things in the world are no more than punishment and reward.