《黄帝内经·素问·皮部论》
络脉的邪气盛，就会向内传入于经，邪气传入于经，是先从属阳的络脉注入于经，然后从属阴的经脉而出，向内注入于骨部。
络盛则入客于经。其入经也，从阳部注于经；其出者，从阴内注于骨。
Excessive qi in the collateral flows inward to the channels; qi that flows inward to the channels first enters into the channel from the collaterals related to the yang and then flows out through the channels related to the yin and enters into the bone region.