What is the origin of Bian Wei's Three Musts?

The origin of Bian Wei's Three Musts is as follows:

Confucius spent a lot of energy reading the Book of Changes again and again, adding a lot of notes. I don't know how many times he opened it. It is generally believed that Confucius could read and write in this way, and the cowhide belt of serial bamboo slips was worn off several times and had to be replaced with new ones for repeated use. This is a metaphor for studying hard.

Even after reading this, Confucius said, "If I live a few more years, I can fully grasp the literary quality of Zhouyi."

Bian Wei San Jue explained

This refers to Confucius' diligent reading of the Book of Changes, which led to the repeated breakage of the bamboo slips; Later, it was a metaphor for studying hard and studying hard.

Source: Historical Records of Confucius by Sima Qian in the Western Han Dynasty: "Confucius likes the Book of Changes late ... reading the Book of Changes, and Wei compiled three unique works."

Confucius liked to read the Book of Changes in his later years ... and he read the Book of Changes frequently, which led to the string of bamboo slips being broken many times.

Example: We advocate Bian Wei's reading spirit, we advocate applying what we have learned, and expect a large number of innovative talents to emerge.