Tasu'a (Arabic: ???????, romanized: Tasu‘a’) is the ninth day of Muharram and the day before Ashura.[4] Several events occurred on this day, including: Shemr's entrance to Karbala, the granting of safe conduct for the children of Umm ul-Banin,[5] preparation for war; and Husayn ibn Ali and his companions were besieged by the enemy (as part of the Battle of Karbala).[6] The day is attributed to Abbas ibn Ali because of his actions as commander in the army of Husayn ibn Ali.[7]