Reply To: Fasting Home › Forums › Decaffeinated Coffee › Fasting › Reply To: Fasting June 27, 2013 1:33 pm at 1:33 pm #961872 Josh31Participant “these 4 fasts are positive Rabbinic commandments” First Mishneh Berurah of Orach Chaim 549 near end: Mem Eyin – Mitzvah Aseh from the words of the prophets