God has some areas where he likes to be supplicated in, and the prayer of the supplicator is accepted (in those areas); the sanctuary of Husayn (a.s.) is one of these.
Am I not the proof (Hujjat) of the Almighty, being his remembrance upon his creatures? Did not the Holy Prophet of Islam (saww) say, "Hasan and Husayn are two Leaders (Im?ms), whether they are sitting or standing"? If I had not done this work (signed the peace treaty), nobody from amongst the Sh?‘as would have remained in this world, and everybody would have been killed and annihilated.
My words are the words of my father, and the words of my father are the words of my grandfather, and the words of my grandfather are the words of my great-grandfathers - Hasan and Husayn; and their words are the words of Ali, and the words of Ali are the words of the Prophet of Allah; and the words of the Prophet are the words of Allah.
God has appionted to the grave of Im?m Husayn (a), four thousand anguished and grief-stricken angels, who weep over him (and shall continue to do so) up until the Day of Judgment.
The one who visits the grave of Im?m Husayn (a) knowing his right (of Im?mat), then it is as if he has done the Ziy?rat of God on the ‘Arsh (throne).