One of the greatest rights of Prophet Muhammad (peace be upon him) over the Muslim Ummah is that the Prophet's message be clarified and addressed to the whole world, said the Grand Mufti at a seminar here Tuesday. Muslims all over the world should be called upon to adhere to and follow the Prophet's Sunnah, Sheikh Abdul Aziz Aal Al-Sheikh said while addressing a symposium, “Prophet's Rights Over His Nation”, organized by the Islamic University of Madina in cooperation with the Global Organization for the Introduction of Prophet Muhammad (peace be upon him). The symposium, patronized by the Emir of Madina region Prince Abdulaziz Bin Majed, was also addressed by Dr. Abdullah Bin Abdulmohsen Al-Turki, Secretary General of the Muslim World League, and Dr. Abdul Rahman Al-Sudais, Imam of the Grand Mosque in Makkah.