Can you tell me the story about how Sai Baba lit lamps with water when the shopkeepers wouldn't give him oil?

According to Chapter 5, Sai Baba had a great fondness for lighting lamps and would collect oil daily from local shopkeepers. One day, the grocers conspired to refuse him oil, calling his requests a nuisance. When they all said 'no', Baba quietly returned to the mosque. He took his tin pot, which had a tiny bit of oil, poured water into it, and drank it as an offering. He then filled the lamps with plain water, soaked the dry wicks, and miraculously lit them. The grocers were amazed to see the lamps burn all night using only water, a powerful event that made them realize their mistake.