Those who gather in hiding are not ill but warmer than spring. Which book is it from?

The original sentence of Huangdi Neijing, an ancient Chinese medicine book, should be "If you don't hide essence in winter, you will get sick in spring."

Essence, in a broad sense, refers to the basic substance that constitutes human life activities. If you don't pay attention to keep warm in winter, the disease is not cured, or the reasons that consume your body, such as staying up late, having too much sex and overworking, lurk in your body, and the warm climate in spring will cause symptoms.