What is the detailed account of Narayanrao, his friend, and the scorpion sting, and what does it reveal about the metaphysical nature of Sai's grace?

The story of Narayanrao and his friend's scorpion sting, found in Chapter 33, is a profound lesson on the nature of faith. When Narayanrao's friend was in agony from the sting, a frantic search for Baba's sacred Udi yielded nothing. In this crisis, Narayanrao turned to a picture of Baba and prayed compassionately. He then noticed the ash from burnt incense sticks at the bottom of the picture frame. In an act of pure faith, he treated this ordinary ash as the blessed Udi. Taking a pinch, he applied it to his friend's sting while chanting Sai's name. The Satcharitra describes that the pain subsided "like water flowing away on a path." This reveals that the physical object, be it Udi or ash, is a medium; the true miracle is manifested through the devotee's unwavering belief and loving remembrance, proving that with complete faith, any substance can become a conduit for Sai's healing grace.