《黄帝内经·素问·刺法论》
水欲降为在泉之左间，遇土气过胜而地阜阻抑之，则土欲降而不能下，水被抑则发为郁气，待郁气散则水气可入，应当折减其胜气，可以散其郁气，在人体则应当针刺足太阴之所出与足阳明之所入。
水欲降而地阜窒抑之，降而不下，抑之郁发，散而可入，当折其土，可散其郁。当刺足太阴之所出，刺足阳明之所入。
Water intends to descend and stay on the left of the spring. If it encounters the excessive Sheng Qi of Earth and the obstruction of the Yellow Earth, Water will not be able to descend. When Water is obstructed, it will transform into U Qi. When the U Qi disperses, Water can enter. The Sheng Qi should be reduced, and the U Qi should be dispersed. In the human body, it means the needling of the beginning of the Foot Taiyin and the end of the Foot Yangming.