Imam Ali Zainul Abedeen (a.s.) said that I was along with my father (Imam Husayn) on the night preceding his martyrdom. Then he addressed his companions thus,
“Consider this night to be an armor for yourselves, for these people desire me and after having killed me they will not turn towards you, while you are pardoned and are capable.”
They replied, “By Allah! This shall never ever happen.”
Imam said,
“All of you will be killed tomorrow and no one will be spared.”
They replied, “Praise be to Allah who has bestowed grace upon us to be martyred along with you.” Then Imam prayed for them and told them to lift up their heads. They did so and saw their status in Paradise, and Imam showed them one after the other their places therein. Thus every one was forwarding his face and chest facing the swords, so as to enter the status in Paradise.
Reference : Nafasul Mahmoom – Shaikh abbas Qummi (r.a.)