I heard Abā ‘Abdillāh (Imam Sādiq (a.s.)) say: Verily there is a known boundary for the location of the grave of Ḥusain ibn ‘Ali (a.s.) and whoever knows it and seeks refuge in it will be protected. I said, “May I sacrifice myself for you! Describe its boundary for me.” Imam (a.s.) replied, “According to the current location of his grave, measure twenty-five ells from the direction of his feet, twenty-five ells from the direction of his face, twenty-five ells from the direction of his back, and twenty-five ells from the direction of his head.” Imam (a.s.) added: The location of the grave of Ḥusain (a.s.) has been a garden from the gardens of Paradise since the day he was buried and the deeds of his Zuwwār ascend to the heavens from this location. There is not any prophet nor any angel in the heavens who does not ask Allāh for permission to go to the Ziyārah of the grave of Ḥusain (a.s.). Therefore, there is always a crowd descending (to go to his Ziyārah) and a crowd ascending (back to the heavens).