The origin of "context"?

The origin of "vein": In ancient times, some people compared the continuous mountains to a dragon, thinking that they were connected like blood from beginning to end, and we could clearly see where they came from and where they were going.

Source: Wu Zhu's "The Study of Cloud Notes and Cattle Faces" in the Ming Dynasty: "It is good to have a thousand hills here, and it is close to the mountains, and it is qualified everywhere."

The meaning of "context" now: refers to clues related to one thing. It also refers to the cause and effect of things.

The mother knew the whole story and didn't blame her son.