What is the 'Satya-Sai vow' that is mentioned in Chapter 13, and how did it originate?

The 'Satya-Sai vow' is a devotional practice that was started by the Patil, as described in Chapter 13. Its origin lies in the Patil's immense gratitude after Sai Baba cured his disease through a dream. Drawing a parallel to the traditional Satyanarayan vow, which people undertook to overcome crises, the Patil created his own version centered on Sai. On Thursdays, he would read specific chapters about Sai Baba from a book instead of the usual Satyanarayan story. According to Chapter 13, the Patil would read the three chapters on Sainath from the 'modern Bhaktalilamrut' written by Das Ganu. He performed this vow regularly with offerings and celebrations, establishing a new tradition in his village born out of his personal experience of Sai's grace.