What is the 'Satya-Sai vow' mentioned in Chapter 13, and how was this tradition started and performed?

The 'Satya-Sai vow' is a tradition that was started by the Patil from Birgaon, as recounted in Chapter 13. Inspired by the common practice of vowing to perform a Satyanarayan puja to overcome a crisis, the Patil created a similar vow dedicated to Sai Baba. He would perform this vow regularly on Thursdays after bathing. Instead of the standard Satyanarayan story, the Patil would read the three chapters about Sainath from the 'Bhaktalilamrut' written by Das Ganu. This ritual was performed with a joyful mind, offerings (Naivedya), and celebration, drawing a parallel between Narayan and Sai. The Patil's personal practice eventually became a custom in his village.