Describe the mistake Babasaheb Tarkhad made while his family was away and his immediate reaction to it.

While his son and wife were in Shirdi, Babasaheb Tarkhad made a significant error in his devotional duty. As recounted in Chapter 9, being preoccupied with his business as a chief officer at a large mill, he completely forgot to offer the 'Naivedya' of sugar candy to Sai Baba's picture during the morning worship. He only realized his mistake later when he sat down for his meal and noticed the customary 'Prasad' was missing. His immediate reaction was one of intense remorse and repentance. He prostrated before Sai's image with tearful eyes, calling his oversight a "great sin" and begging for immediate forgiveness.