《黄帝内经·灵枢·师传》
黄帝说：通过诊察面部色泽来推测五脏精气的方法，我已经知道了，那怎样根据形体肢节的情况推测内脏的情况呢？
黄帝曰：五脏之气，阅于面者，余已知之矣，以肢节知而阅之，奈何？
The Yellow Emperor said: I have already learned the method of inferring the condition of the five viscera's essence and qi by observing the color of the face, but how can we infer the condition of the internal organs based on the condition of the body shape and limbs?