《黄帝内经·素问·刺法论》
针刺完毕，安静神志七日，且不可大悲伤，悲伤则动肺气，使真气再度消散；人们要使肺气充实，重要的方法是闭气养神。
刺毕，静神七日，勿大悲伤也，悲伤即肺动，而其气复散也。人欲实肺者，要在息气也。
After acupuncture is finished, quiet the spirit for seven days, and do not have a huge sadness, sadness will move lung qi, cause the real qi to once again dissipate; people need to cause the lung qi to be sufficient, an important method is to hold the breath and nourish the spirit.