What is the significance of the dust from a saint's feet, according to the start of Chapter 47?

At the beginning of Chapter 47, the significance of the dust from a saint's feet is illustrated using a powerful metaphor of a river. The text describes the river feeling defiled and desiring this sacred dust to "wash away her accumulated impurities." The river yearns for this contact, thinking, "When will the feet of saints touch me?" According to Chapter 47, the river "knows for certain that without this, there is no deliverance from her sins." This highlights the deep-seated belief that physical contact with a true saint, even with something as humble as the dust from their feet, possesses immense spiritual power to purify and grant deliverance from sin.