《黄帝内经·灵枢·经别》
黄帝问岐伯说：我听说人体的组成是与天地万物相对应的。其在内，有属阴的五脏与自然界之五音、五色、五时、五味以及五方位等相对应；其在外，有属阳的六腑与六律相对应。
黄帝问于岐伯曰：余闻人之合于天地道也，内有五脏，以应五音、五色、五时、五味、五位也；外有六腑，以应六律。
The Yellow Emperor asked Qibo, "I heard that the composition of human body corresponds to the nature and the universe. Inside, there are Yin organs corresponding to the five tones, five colors, five seasons, five tastes, and five orientations in the nature; and outside, there are Yang organs corresponding to the six lvs (musical notes in Chinese music)."