Who did Kaka Mahajani's skeptical friend remember upon hearing Sai Baba's voice for the first time?

Upon hearing Sai Baba's voice for the first time, Kaka Mahajani's skeptical friend was instantly reminded of his deceased father. Chapter 35 recounts that as the man stepped into the mosque, Baba's loving words, 'Why have you come, sir,' struck him with their familiar tone. He was astonished, feeling that it was a perfect imitation of his late father's exact vocal style, which caused him to melt inside and forget his previous resolve not to bow.