How does Chapter 41 connect the story of Sai's portrait with a previous event and a dream?

Chapter 41 masterfully links several events. It begins by referencing the conclusion of a vow from the previous chapter before introducing the story of how a physical portrait of Sai arrived unexpectedly. The chapter explains that the narrator had a dream in which Sai promised, "On a Holi festival day, I am coming to your house for a meal today." This dream was fulfilled in a miraculous way when a man named Alli Mohammed arrived at the narrator's house with a photo of Sai. As described in Chapter 41, this happened on the day of Holi, at the very peak moment when they were about to sit for lunch, thus fulfilling Sai's dream-promise precisely.