What surprising instruction did Sai Baba give to Das Ganu regarding his doubt about the Upanishad?

When Das Ganu arrived in Shirdi and presented his doubt about the deep meaning of the Ishavasya Upanishad, Sai Baba's response was unexpected. Instead of providing a direct scriptural explanation or discourse, Baba gave him a cryptic instruction. As recounted in Chapter 20, Baba told Das Ganu that the solution to his problem would not come from Baba himself in Shirdi. Instead, he prophesied, "The resolution of this doubt of yours will be done by the maidservant at Kaka’s house When you return there." This set up a future event where wisdom would come from a very humble and unforeseen source.