《黄帝内经·素问·六节藏象论》
三气合而成天，三气合而成地，三气合而成人，三三而合成九气，在地分为九州，在人体分为九脏。
三而成天，三而成地，三而成人。三而三之，合则为九，九分为九野，九野为九脏。
Three qi combine to form the sky, three qi combine to form the earth, and three qi combine to form humans; three threes combine to form nine qi; the earth is divided into nine states, and the human body is divided into nine organs.