Can you explain the origin and practice of the 'Satya-Sai vow' mentioned in the source materials?

The 'Satya-Sai vow' was a tradition started by the grateful Patil after he was miraculously healed by Sai's grace. Chapter 13 details how, filled with gratitude, the Patil created this practice, modeling it after the common Satyanarayan vow. He would perform this vow every Thursday after bathing. Instead of the traditional story, the Patil would read from the 'modern Bhaktalilamrut' written by Das Ganu, specifically the three chapters detailing the character of Sai. The text highlights that the Patil saw no difference between Narayan and Sai, simply adapting the ritual to honor the one who had saved him. This practice brought him 'boundless happiness' and eventually became a custom in his village.