What unusual instruction did Sai Baba give to Das Ganu to help him understand the Ishavasya Upanishad?

When Das Ganu came to Shirdi with a profound doubt about the meaning of the Ishavasya Upanishad, Sai Baba gave him a very unusual instruction. Instead of providing a direct philosophical discourse or explanation, Baba's response was quite cryptic. As detailed in Chapter 20, Baba told him, "The resolution of this doubt of yours will be done by the maidservant at Kaka’s house when you return there." This surprising guidance, which pointed Das Ganu toward an unlikely source of wisdom, sets the stage for the rest of the story and demonstrates Baba's unconventional teaching methods.