Koran became the final word for Islam after the demise of Prophet Mohammad. A loyal follower of Mohammad was elected as his successor and he and his successors reigned peacefully. But during the time of Ali, the prophet’s Son-in-Law, there was opposition from many sections. Ali and his elder son, Hassan were killed. His youngest son Hussain was brutally murdered by severing his head.
It was tenth of the month, Muharram, when Hussain was killed. This event was named as Ashura. On this day, devout people express their grief for killing of Hussain. It is Shia sect in Muslims, which consider Ali, Hussain and Hassan as the rightful successors of Prophet Mohammad.