《黄帝内经·灵枢·禁服》
黄帝和雷公一起进入斋室，举行割臂歃血仪式，黄帝亲自祝告说：今天中午，我们歃血盟誓，传授九针的要道，如果谁违背了今天的誓言，必定遭受祸殃。
黄帝乃与俱入斋室，割臂歃血，黄帝亲祝曰：今日正阳，歃血传方，有敢背此言者，反受其殃。
The Yellow Emperor and Thunder God entered the fasting room together and held a ritual to cut their arms and drain blood. The Yellow Emperor personally prayed and said: Today at noon, we take an oath of blood to pass on the essential principles of the Nine Needles. If anyone violates today's oath, they will surely be punished.