《黄帝内经·素问·血气形志》
足太阳膀胱经与足少阴肾经互为表里，足少阳胆经与足厥阴肝经互为表里，足阳明胃经与足太阴脾经互为表里，这是足三阳经和足三阴经之间的表里配合关系。
足太阳与少阴为表里，少阳与厥阴为表里，阳明与太阴为表里，是为足阴阳也。
The Foot Sun Bladder Meridian and the Foot Shao Yin Kidney Meridian are mutually exterior and interior, the Foot Shao Yang Gallbladder Meridian and the Foot Jue Yin Liver Meridian are mutually exterior and interior, the Foot Yang Ming Stomach Meridian and the Foot Tai Yin Spleen Meridian are mutually exterior and interior. This is the exterior and interior cooperative relationship between the Foot Three Yang Meridians and the Foot Three Yin Meridians.