《后汉书·列传·吴延史卢赵列传》
卢植虽然是个布衣，认为窦武平日有好的名誉，于是写信规劝他说 ：我曾经听说寡妇有不忧纬少的事，漆室女倚柱悲吟，她们所忧伤的不是个人自己的事，都是为国而忧，忧深思远，这是君子爱国的高尚感情。
植虽布衣，以武素有名誉，乃献书以规之曰：植闻嫠有不恤纬之事，漆室有倚楹之戚，忧深思远，君子之情。
Although Lu Zhi was a commoner, he thought Dou Wu had a good reputation on weekdays, so he wrote a letter to advise him: I've heard that widows rarely have sorrows about clothes and food, and unmarried women seldom sigh against pillars. The sorrows they have are not personal affairs, but rather concerns for the country. This kind of sentimental worry for the country is a noble feeling that gentlemen have.