Seeing and witnessing their places in heaven would...

Seeing and witnessing their places in heaven would strengthen their wills and make them fight with more determination and certainty. On the day of ‘Ashura, Imam al-Husayn (as) was repeatedly asking for help. He would say, «هل من ناصر ينصرني؟» This is not compatible with giving his companions permission to leave and setting them free from any obligation.

It has been narrated in some history books that Imam al-Husayn (as) entered Zaynab’s tent after talking to Nafi‘ ibn Bilal and the other companions. Nafi‘ ibn Bilal stood outside Zaynab’s tent waiting for Imam al-Husayn (as) to come out. He heard Zaynab’s voice. She was talking to Imam…