I just wanted to know would fasting tomorrow in the martyrdom of Musa al-Kazim, would it be void or acceptable? And what what are then benefits of it? July 29, 2017 by Admin Fasting is mustahab in rajab everyday. It is for seeking allah only Syed Niaz Hussein AllahBenefitsFastingMartyrdomMusa al-KazimMustahabrajab