What treatment did Sai Baba prescribe for Amir Shakkar's rheumatism?

According to Chapter 22, when Amir Shakkar detailed his illness of rheumatism to Sai Baba and prayed for deliverance, Baba provided a unique remedy. Instead of a physical medicine, Baba's cure was His word and a specific instruction: Amir was to stay steadily in the Chavadi. Baba's firm words were that he should not worry about the conditions, whether it was windy, rainy, or damp. Despite the place being outwardly contrary to healing, Amir was to accept Baba's word as his medicine and remain there for his recovery.