Chapter on Categories of Fasting and the Explanation of All of Them with Clarification

And from him, from al-Hasan ibn Ali al-Hashimi, from Muhammad ibn Musa, from Yaqub ibn Yazid, from al-Washsha, who said: Najiyyah ibn al-Harith al-Attar narrated to me, saying: I (narrator) asked Abu Ja’far عليه السلام, peace be upon him, about ‘fasting the day of Ashura.’ Imam عليه السلام said: “It is a fast abandoned by the coming down of the month of Ramadan, and (doing) the abandoned is an innovation.” Najiyyah said: “Then I asked Abu Abdillah عليه السلام, peace be upon him, about that after his father عليه السلام, peace be upon him, and Imam عليه السلام answered with the like of the answer of his father عليه السلام.” Then Imam عليه السلام said to me: “Indeed, it is the fast of a day concerning which no Book came down and no Sunnah took place, except the Sunnah of the family of Ziyad, may Allah سبحانه وتعالى curse them, through the killing of Imam al-Husayn ibn Ali عليه السلام, may the blessings of Allah سبحانه وتعالى be upon him.”