Chapter on Making Up the Month of Ramadan, and the Ruling of One Who Breaks the Fast in It Intentionally and Forgetfully, and One upon Whom Fasting Two Consecutive Months Is Obligatory and He Breaks the Fast during Them, or upon Whom There Is a Vow Regarding Fasting

Sa’ad ibn Abdillah, from Abu Jafar, from al-Husayn ibn Said, from Fadalah ibn Ayyub, from Musa ibn Bakr, from al-Fudayl ibn Yasar, from Abu Ja’far عليه السلام, peace be upon him, who said: Imam عليه السلام said regarding ‘a man who made upon himself the fasting of a month, so he fasted fifteen days, then an affair occurred for him.’ Imam عليه السلام said: “It is permissible for him to make up what remains upon him. But if it was less than fifteen days, it is not permissible for him until he fasts a complete month.”