《黄帝内经·灵枢·邪客》
黄帝问岐伯说：我想知道持针的技法，进针的道理，比如，纵针而不持，或舍针而不用的缘故，以及展平皮肤而使腠理张开的刺法，这些是怎样的呢？
黄帝问于岐伯曰：余愿闻持针之数，内针之理，纵舍之意，扞皮开腠理，奈何？
The Yellow Emperor asked Qi Bo: I wonder what the techniques of holding the needle are, and the principles of inserting the needle, such as the reasons for inserting the needle without holding it, or discarding the needle without using it, and the methods of acupuncture to smooth the skin and open the pores. How are these done?