Can you recount the story of the two gentlemen from Goa and their offerings to Sai Baba?

As narrated in Chapter 36, two gentlemen from Goa came together for Sai Baba's darshan. During their visit, a curious event unfolded. Sai Baba specifically asked for Dakshina of fifteen rupees from only one of the men, who gave it with joy. However, when the second gentleman, unprompted, offered a larger sum of thirty-five rupees, Sai Baba immediately rejected the offering. This act of apparent partiality surprised everyone present, including his close devotee Madhavrao (Shama), who then questioned Baba on why he accepted money from one friend but refused a voluntary offering from the other, setting the stage for Baba's deeper explanation.