《史记·七十列传·田叔列传》
文帝说： 先帝安置孟舒任云中郡太守十多年了，匈奴才入侵，孟舒就不能坚守，无缘无故让士兵战士几百人。
上曰： 先帝置孟舒云中十馀年矣，虏曾一人，孟舒不能坚守，毋故士卒战死者数百人。
Emperor Wen said: The late emperor sent Meng Shu to be the prefect of Yunzhong 郡 for more than ten years, and the Huns invaded, Meng Shu could not hold on to it, and for no reason let hundreds of soldiers and fighters die.