《后汉书·列传·杜栾刘李刘谢列传》
年轻时读书，每读到忠臣义士的事，常常废书仰天叹息。
少时每读书，得忠臣义士之事，未尝不投书而仰叹。
When he was young and reading, every time he read about loyal ministers and righteous men, he would often throw down his book and sigh up at the sky.