Can you tell me about the incident with the two gentlemen from Goa and the dakshina?

Chapter 36 narrates an event where two gentlemen from Goa visited for Sai Baba's darshan. Both men surrendered at Baba's feet, but Baba's interaction with them regarding Dakshina (a monetary offering) was quite peculiar. As described in the chapter, Baba specifically asked for and accepted fifteen rupees from one of the men. However, when the second gentleman voluntarily offered thirty-five rupees, Baba immediately rejected the offering. This act of apparent partiality surprised everyone who was present at that time, prompting questions about Baba's seemingly inconsistent behavior.