Ali ibn al-Hasan ibn Faddal, from Yaqub ibn Yazid, from Abu Hammam, from Abd al-Rahman ibn Abi Abdullah, from Abu al-Hasan عليه السلام, peace be upon him: Imam عليه السلام said: “Fasting the day of Arafah is equal to the year.” And Imam عليه السلام said: “Imam al-Hasan عليه السلام, peace be upon him, did not fast (day of Arafah), and Imam al-Husayn عليه السلام, peace be upon him, fasted (day of Arafah).”