Sure enough, a man by the name of Muhammad ibn 'Abdullah was born in the very city that Prophet Ibrahim had made this supplication centuries earlier. For twenty-three years, Prophet Muhammad spread the message of Tawhid - the same message that Prophet Ibrahim and all the other Prophets came with - and established the law of Allah upon the land. This article, History of Hajj in Brief, is self-explained and needs to be read by those interested in such history.