《淮南子·天文训》
季秋三月，地气向下伏藏，大自然有了收敛的萧杀之气。各种昆虫蛰伏起来，关闭门户静静地待在洞穴里。
至秋三月，地气不藏，乃收其杀，百虫蛰伏，静居闭户，青女乃出，以降霜雪。
The third month of autumn: the earth's qi descends and hides, and nature exhibits a harsh, desolate air. Insects hibernate, guarding their doors and quietly waiting in their holes. 