Who is Bhagirathi as mentioned in Chapter 47, and what is her desire?

In Chapter 47, Bhagirathi is another name for the sacred River Ganges. The text presents an analogy where the river, despite being a purifier for the world, becomes soiled herself by washing away the sins of humanity. To cleanse herself of these accumulated impurities, she desires the dust from the feet of saints. As described in the chapter, the River Bhagirathi wonders, "When will the feet of saints touch me? When will they come to bathe within me?" This illustrates the supreme purifying power attributed to saints like Sai Baba, suggesting their holiness surpasses even that of the sacred Ganges.