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

Certainly. The 'Satya-Sai vow' was a tradition started by the Patil following his miraculous healing, as detailed in Chapter 13. Inspired by the common practice of vowing to perform a Satyanarayan puja to overcome a crisis, the Patil began his own version dedicated to Sai Baba. On Thursdays, after bathing, he would read from the 'modern Bhaktalilamrut' written by Das Ganu. Specifically, he would read the three chapters about Sainath, which he considered to be the 'Satya-Sai story.' The text explains that he performed this vow regularly with friends and relatives, including an abundance of offerings, just like the traditional Narayan puja. This practice, initiated out of gratitude, became a custom in his village.