What is the story of Das Ganu and the holy rivers in Chapter 22?

The story of Das Ganu is a central event in Chapter 22. Das Ganu expressed a desire to go on a pilgrimage to bathe in the holy waters of Prayag. In response, Sai Baba told him that the pilgrimage could be completed right there, instructing, "Know this big toe of Mine to be Prayag; bathe right here." Following Baba's command, Das Ganu placed his head on Baba's feet. At that very moment, as the chapter describes, the waters of both the Ganga and Yamuna rivers manifested and began to flow from Baba's big toe. This miracle satisfied Das Ganu's desire and demonstrated that devotion to the Sadguru's feet was equivalent to undertaking a great pilgrimage, a powerful lesson contained within Chapter 22.