According to the History of the Prophets and Kings, when Ali ibn Husayn Zayn al-Abidin gave the sermon in presence of Yazid, he let them hold the mourning of Husain ibn Ali for three days in a formal manner.In the Umayyad Caliphate, the mourning of Husain ibn Ali’s Killing was performed furtively in the homes of Shia Imam and their followers, but during the Abbasid Caliphate this mourning was observed in public mosques by the Abbasid rulers to draw people’s attention.