I heard Abu Abdillah Ja’far ibn Muhammad, peace be upon him, say: "Our authority is derived form the divine authority, with which every Prophet was sent. Allah, His Name be glorified, presented our authority to the heavens, the earth, the mountains and the cities and none gave it the type of acceptance given by the people of Kufa. Surely, on its one side there is a grave (i.e. Najaf), whenever an afflicted person visits it, Allah relieves him of the affliction, answers his prayers and returns him to his family with happiness and delight."