What was Sai Baba's initial advice to Das Ganu regarding his doubt about the Ishavasya Upanishad?

In Chapter 20 of the Sai Satcharitra, when Das Ganu approached Sai Baba in Shirdi with a doubt that arose while he was writing his commentary on the Ishavasya Upanishad, Baba gave him very specific and seemingly unusual advice. Instead of explaining the scripture himself, Baba told Das Ganu that the resolution for his doubt would be provided by a simple maidservant at Kaka’s house when he returned there. This instruction, as mentioned in Chapter 20, sets up the next part of the story, demonstrating Baba's unique method of teaching through everyday circumstances and people.