What miraculous event is associated with Das Ganu in Chapter 22, and what does it reveal about Sai Baba's feet?

In a remarkable incident detailed in Chapter 22, Das Ganu sought Sai Baba's permission to travel to Prayag for a holy bath. In response, Baba declared, "Know this big toe of Mine to be Prayag; bathe right here." Demonstrating his faith, Das Ganu placed his head on Baba's feet. At that very moment, the waters of both the sacred Ganga and Yamuna rivers miraculously manifested from Baba's big toe. This event satisfied Das Ganu's desire and powerfully demonstrated that the Sadguru's feet are the ultimate pilgrimage site, containing the sanctity of all holy places.