While on the way of Kufah...
While on the way of Kufah, he received the striking news that under the pressure of Yazid's agents, people of Kufa did not support his representatives and turned back, and some of them joined the Yazid's army to kill Imam's representatives in Kufah. The feet of those martyrs were tied and they were dragged through the streets of Kufah. The city and its surroundings were under very strict marshal law by countless soldiers of enemy who where waiting to face Imam.
There was no way for Imam to turn into unless to march ahead and face the death. Approximately 44 miles from Kufah, in a desert called Karbala, Imam and his followers were surrounded by the army of Yazid. They cut off the water supply of the Household of Prophet and their companions and their families among them were many women and children.
For eight days they stayed in that place under the heat of the sun, and the circle among them narrowed and the number of enemy's army increased by a number of 30,000 fully equipped soldiers of Yazid. In the following night, Imam gathered his companions and gave the a short speech saying that there was nothing ahead but martyrdom.
He added that since the enemy was concerned only with his person, he would free them from all obligations so that any one who wished could escape in the darkness of the night and save his life. Then he ordered the lights to be turned off, and most of his companions who had joint him for their own advantages, dispersed. Only those whose hearts were tested by Allah remained who were about 40 companions and some from Bani Hashim (his relatives).
Once again, Imam gathered those who remained to put them on the test. He addressed his companions and Hashimite relatives, repeating that enemy was only concerned with him and they could escape the danger in the darkness of night. But this time the faithful companions answered each in own way that they would not deviate from the right path and would never leave him alone. They said that they would defend the Household of Prophet to the last drop of their blood as long as they could carry a sword.
The enemy intended to start the war in the eve of the ninth day of the month, but Imam asked for a delay till next morning to worship all over the night for the last time. During the night, some 30 soldiers of enemy joint Imam, among them was Hurr who was one of the Generals of the army of enemy. They finally chose their way to be with Imam, and Imam accepted their repentance.