《汉书·传·赵充国辛庆忌传》
这年秋天，赵充国生病了，皇上赐书说： 制诏后将军：听说您苦于腿脚疼痛，风寒下泄，将军年迈再加疾病，一朝之变不可讳言，朕对此很忧虑。
其秋，充国病，上赐书曰； 制诏后将军：闻苦脚胫、寒泄，将军年老加疾，一朝之变不可讳，朕甚忧之。
That autumn, Zhao Chongguo took ill, and the emperor bestowed a letter on him saying: By imperial edict, to the general at the rear: I have heard that you are suffering from painful legs and wind and cold dysentery. The general is advanced in years, and with the addition of illness, I cannot avoid referring to the changes that may come upon you in a single morning. I'm very worried about this.