Who felt immense remorse and wrote a letter to his son in Shirdi asking for forgiveness from Sai?

Babasaheb Tarkhad, the father, was the one who felt immense remorse after breaking his vow. As Chapter 9 recounts, after he realized at his dining plate that he had forgotten to offer the Naivedya, he was overcome with grief. He prostrated before Sai's photograph with tearful eyes, calling his mistake a 'great sin' and feeling deep repentance. In his helplessness, he wrote a letter to his son, who was in Shirdi, confessing his great error and pleading with his son to ask for Sai Baba's forgiveness on his behalf.