Muharram, a time of grief and sorrow for the Ahl-al-Bayt (‘a)/Muharram from the viewpoint of Imam Riḍa (‘a)/ The Imam camps at a lodging place called the “Palace of Bani-Muqātil”/ Imam Husayn (‘a) asking ʿUbaydullah ibn Ḥurr to j o i n and help him/ Imam Husayn’s (‘a) remarks to ʿUbaydullah ibn Ḥurr Juʿfī/ ibn Ḥurr: one of those who remained behind/ Imam Husayn (‘a)’s last ultimatum to all the people