《黄帝内经·素问·平人气象论》
冬时的脉象，沉石而有冲和之象的，叫做平脉，如果石多而冲和的胃气少，就主肾脏有病；如果但见石脉而无胃气，就要死亡；若沉石脉中兼见钩象，预测延至夏天就要生病；倘若钩脉太甚了，就会立即生病。
冬胃微石曰平，石多胃少曰肾病，但石无胃曰死，石而有钩曰夏病，钩甚曰今病。
In winter, a deep and hard pulse with a sense of harmony is called a normal pulse. If the hard pulse is too frequent, but the corresponding stomach qi is weak, then there is a problem with the kidneys. If only the hard pulse is present, but not the corresponding stomach qi, then death is imminent. If the deep and hard pulse is accompanied by a hooked shape, illness will arise in the summer. If the hooked pulse is too severe, illness will arise immediately.