During these sacred months, warfare is forbidden. Before the advent of Islam, the Quraish and Arabs also forbade warfare during those months.Before Islam, the Arabs also fasted on the tenth day of Muharram. This day also had importance in other Abrahamic religions like Judaism and Christianity. Muhammad also fasted many times on this day before his prophethood and after his migration to Medina and also ordered the Muslims to fast on this day and ninth and eleventh day as well.