What was the initial agreement Kaka Mahajani's friend made before going to Shirdi, and what happened when he actually met Sai Baba?

According to Chapter 35, Kaka Mahajani's friend was a devotee of the formless and averse to idol worship. He agreed to go to Shirdi with his friend Kaka Mahajani out of clinical curiosity, but only under two conditions: that he would not bow his head to the saint and would not provide any Dakshina. However, upon arriving at the mosque, Sai Baba spoke to him in a sweet voice that sounded exactly like his deceased father's. This experience astonished the friend, causing him to melt inside and completely forget his previous resolve. As a result, he spontaneously bowed his head at Baba's feet, breaking the first part of his agreement.