‘O People, no prophet or messenger will come after me and no new faith will be born. Reason well, therefore, O People, and understand words which I convey to you. I am leaving you with the Book of Allah (the Quran) and my Sunnah (the lifestyle and the behavioral mode of the Prophet); if you follow them, you will never go astray. All those who listen to me shall pass on my words to others and those to others again; and may the last ones understand my words better than those who listen to me directly.’