Kitab Al-Nawadir (uncommon reports)

And through the same chain of narrators from Aban bin Taghlib that he said: Abi Abdullah عليه السلام said: “As if I can see the Qaim astride a black speckled horse which has a white mark between its eyes. When his horse moves no one will remain in any town who does not think that he is in that town. When he waves the flag of the Messenger of Allah صلى الله عليه وعلى آله وسلم 13000 angels will come down to him. Of them 13 will be awaiting for the Qaim. These angels are same who were with Prophet Nuh عليه السلام in his Ark, who were with Prophet Ibrahim عليه السلام when he was thrown into the fire and who were with Prophet Isa عليه السلام when he was taken up to the heavens. And 4000 will be following him with flags. 313 are those angels who were present in the Battle of Badr and 4000 are those who came down to accompany Imam Husain عليه السلام in fighting against the Yazidite forces. However they were not allowed to take part in the battle. So they returned to Allah to take the permission but when they came down once more Imam Husain عليه السلام was already martyred. Thus today they remain with disheveled hair and dust smeared condition at the grave of Imam Husain عليه السلام where they will continue to lament till the Judgment Day. And there is constant coming and going of angels between the grave of Imam Husain عليه السلام and the heavens.”