Could you explain the miracle involving Das Ganu at Sai Baba's feet as told in Chapter 22?

Chapter 22 recounts a significant miracle experienced by Das Ganu. When Das Ganu sought permission from Sai Baba to go on a pilgrimage to bathe in the holy waters of Prayag, Baba instructed him otherwise. Baba declared, "Know this big toe of Mine to be Prayag; bathe right here." Trusting his Guru's words, Das Ganu placed his head on Baba's feet. At that very moment, a miracle occurred: the sacred waters of both the Ganga and Yamuna rivers manifested from Baba's big toe. This event, mentioned in Chapter 22, demonstrated that the Guru's feet were the ultimate pilgrimage site, containing the sanctity of all holy places.