Where does this sentence come from? Which expert can tell me.

This sentence does not exist in ancient poems. It was modified by modern people by quoting the poem "Three hundred and sixty days a year, the wind, frost, and sword force each other" in "A Dream of Red Mansions" written by Cao Xueqin. This sentence comes from Lin Daiyu's "Flower Burial Speech" in Chapter 17 of "A Dream of Red Mansions": "Three hundred and sixty days a year, the wind, the sword, the frost, the sword force each other. How long can the bright and beautiful beauty last? It is hard to find it once it wanders." Now The term "wind knife and frost sword" is used to describe the cold climate and also metaphorically describes the harsh environment.

There are many modified works by modern people, such as:

Bronze mirror with bright beauty embroidered with spring colors

Wind knife, frost, sword and words like snow

Even if Yu'er has no place to look for

There will eventually be a murmuring swing rope