Can you explain the story about Sai Baba grinding wheat and why he had the flour thrown away?

In Chapter 1, a curious event is described where Sai Baba, a detached saint with no possessions, suddenly begins grinding wheat in the mosque. As news spread, four women rushed to help, taking over the task while singing his praises. They finished grinding and, believing Baba had no use for the flour, greedily planned to divide it amongst themselves. However, Baba became angry, scolding them for their greed and ordering them to take the flour and throw it on the village boundary. The initial reason was not apparent, but as Chapter 1 later reveals, the act was a divine play. The wheat was not grain but symbolized a cholera epidemic ravaging the village. By grinding it and casting it out, Baba spiritually drove the disease away, and the epidemic began to recede.