Can you give me a step-by-step summary of the event where Baba ground the cholera epidemic?

Certainly. The event, as detailed in Chapter 1, began with Baba unexpectedly sitting down at a grinding stone in the mosque and beginning to grind wheat by himself. As news spread, four women from the village ran to the mosque, took the handle from him, and finished the grinding while singing his praises. Afterwards, they greedily assumed the flour was for them and prepared to divide it. At this point, Baba, who had been silent, became angry and chastised them for trying to take what wasn't theirs. He commanded them to take all the flour and throw it on the village boundary. The women, though humiliated, obeyed. It was later revealed that the wheat symbolized the cholera epidemic, and by grinding it and having it cast out, Baba miraculously caused the disease to recede from the village.