Can you tell me about the incident involving the two gentlemen from Goa and their offerings to Sai Baba?

Chapter 36 recounts an event where two gentlemen from Goa visited Sai Baba for his darshan. In a curious interaction, Baba specifically asked for and accepted a Dakshina of fifteen rupees from one of the men. However, when the second man, of his own accord, offered a larger sum of thirty-five rupees, Baba immediately rejected it. This act of apparent partiality caused great surprise among the onlookers, including Madhavrao (Shama), who was present at the time and felt compelled to question Baba about his seemingly inconsistent behavior, as detailed in the chapter.