Can you describe the incident involving the two gentlemen from Goa who visited Sai Baba?

Certainly. As narrated in Chapter 36 of the Shri Sai Satcharitra, two gentlemen from Goa came together for Sai Baba's darshan. Both men surrendered at Baba's feet, filled with joy. A curious event then transpired. Sai Baba specifically asked for a Dakshina of fifteen rupees from only one of the men, which he gave with joy. The second gentleman, on his own accord, offered thirty-five rupees, but Sai Baba immediately rejected his offering. This apparent partiality surprised everyone present, including Madhavrao, also known as Shama, who then questioned Baba about his actions.