《黄帝内经·素问·玉机真藏论》
假如违反了这种现象，就是病脉。岐伯说：其脉气来浮软而中央坚，两旁虚，这叫做太过，主病在外；其脉气来浮软而微，这叫做不及，主病在里。
岐伯曰：其气来，毛而中央坚，两旁虚，此谓太过，病在外。其气来，毛而微，此谓不及，病在中。
If it violates this phenomenon, it is a diseased pulse. Qi Bo said: Its pulse is floating and soft, but the middle is firm, and the sides are empty, which is called excessive, the disease is external; its pulse is floating and soft, and weak, which is called insufficient, the disease is internal.