Husain is the victim about whom Allah said...
On his back are two signs, one sign of the color of his skin and another like the sign of the Messenger (a.s.). He has two names. One name will be hidden and the other, proclaimed. The one that will be hidden is Ahmad and the one that will be announced is Muhammad. When his standards will wave, the east and the west will be illuminated for him. He will put his hand on the heads of people, so there will remain no believer but his heart will be stronger than a block of iron.
And Allah will grant him the might of forty men. There will remain no dead, but that gaiety will reach him in his heart and in his grave. The dead will be visiting each other and felicitating each other for the news of the rise of Qaim (a.s.).
6- Ikmaaluddin: From the same chains, it is narrated from Muhammad bin Sinan from Amr bin Shimr from Jabir from Imam Muhammad Baqir (a.s.) that he said: “The knowledge of the Book of Allah, the Exalted, and the conduct of His Messenger (a.s.) will grow in the heart of our Mahdi like the best growth of a plant.
So whoever of you remains there until he meets him, he has to say when he sees him, “Peace be unto you, O Household of Mercy and Prophethood, the Source of Knowledge and the Abode of Apostleship.” It has also been narrated that the proper greeting for the Qaim will be as follows: “Peace be unto you, O Divine Redeemer on His earth.