6. A number of our people have narrated from Sahl ibn Ziyad and Ahmad ibn Muhammad from al-Hassan ibn Mahbub from Ishaq ibn ‘Ammar who has said the following: “I heard him (the Imam) , say, ‘The clay of the grave of al-Husayn , has a well-known sanctity. One who with proper understanding seeks refuge therein, he receives protection thereby.’ I then asked him (the Imam) to identify for me its location. He said, ‘From the location of his grave today, measure twenty- five yards from its front side, twenty- five yards from the side of his head, twenty-five yards from the side of his feet, twenty-five yards from the side of his back. The location of his grave from the day he was buried is a garden of the gardens of paradise. It is an ascending place. From this place the deeds of his visitors are taken to the heaven. There is no angel or prophet in the heaven who do not ask Allah for permission to visit al-Husayn . Thus, one group descends down and the other group ascends up.”’