Abu Afak was one of the people who had the guts to criticise Muhammad. He paid with his life. The story is not mentioned in the Hadith but is described in the Biography of Muhammad by Ibn Ishaq on p 675. Ibn Ishaq was a devout Muslim who collected reports on the events connected with the beginnings of Islam. Those reports had been passed on by Muslims from generation to generation. What is striking is the negative picture of Muhammad that emerges. The story has a lesson for everyone in our days. The reasoning used in the story of Abu Afak is gaining popularity now among both Muslims and non-Muslims.