I've heard a story about Das Ganu and the holy rivers Ganga and Yamuna. What does Chapter 22 say about this event?

Chapter 22 recounts the remarkable incident involving Das Ganu's desire to visit Prayag. When Das Ganu asked Sai Baba for permission to bathe in the holy waters, Baba instructed him, "Know this big toe of Mine to be Prayag; bathe right here." The text states that as soon as Das Ganu placed his head on Baba's feet in obedience, a miracle occurred. From the very spot of Baba's big toe, the waters of both the Ganga and Yamuna rivers manifested. This event, which demonstrated Baba's "unfathomable power, inconceivable lila," led Das Ganu to compose a verse celebrating the experience, showing that the Guru can bring the holiest of blessings directly to the devotee.