《汉书·传·万石卫直周张传》
石建任郎中令，向皇上上奏事情，奏书被报下时，石建便阅读，他惊恐地说： 写 马 字下面四点和尾共五，这裹把 马 字写成四点，少写一点，皇上会责怪死的。 
建为郎中令，奏事下，建读之，惊恐曰： 书 马 者与尾而五，今乃四，不足一，获谴死矣！ 
When Shi Jian worked as a Central Palace Attendant, he presented memorials to the emperor. When the decree was pronounced, Shi Jian read it. Then he exclaimed in fear: "There should be five strokes below the character 'horse', including four dots and a tail, but here, the character 'horse' has only four dots. Lacking one dot, the emperor will blame me for being careless."