《黄帝内经·素问·疟论》
这都是由于夏天伤于暑气，热气过盛，并留藏于皮肤之内，肠胃之外，亦即营气居留的所在。
此皆得之夏伤于暑，热气盛，藏于皮肤之内，肠胃之外，此荣气之所舍也。
All of these are caused by the damage of summer heat, excessive heat, which remains in the skin and outside the gastrointestinal tract, that is, where the yingqi resides.