Can you tell me about the two gentlemen from Goa who visited Sai Baba and the strange incident with their offerings?

Certainly. Chapter 36 recounts the visit of two gentlemen from Goa who came for Sai Baba's darshan. While both surrendered at his feet with joy, a peculiar event occurred regarding their offerings. Sai Baba specifically asked one of the men for fifteen rupees in Dakshina, which the man gave happily. However, when the second gentleman offered thirty-five rupees on his own accord, Baba immediately rejected the offering. This apparent partiality surprised everyone present, including Madhavrao (Shama), who then questioned Sai about it.