Imam Riďā (a.s.) said: Those who go to the Ziyārah of the grave of Ḥusain (a.s.) have performed a Hajj and an ‘Umrah. I asked, “Does it replace performing Ḥajjatul Islām?” Imam (a.s.) replied: No, it is (registered as) Hajj for those who do not have the means of going to Hajj until the means become available to them to perform the Hajj of the sacred House of Allāh. Do you not know that everyday seventy thousand angels circulate the House (Ka’bah) until nightfall, after which they ascend back to the heavens and are then replaced by other angels who circulate the House until morning?! Verily Ḥusain (a.s.) is more honourable to Allāh than the House. Verily seventy thousand (different) angels who are disheveled and covered with dust descend to him (his grave) at the time of each prayer, and they will not have another opportunity (to return to his grave) until the Day of Judgment.