《明史·列传·卷四十八》
于谦说国家目前多难，不是做臣子的推辞劳苦的时候，上奏请亲自前往。
谦言国家多难，非臣子辞劳之日，奏乞躬往。
Yu Qian said that the country was facing many challenges and that this was no time for officials to shirk their duties, and he requested in a memorial that he be allowed to go in person.