It is the day when the Almighty Allah bestowed to Hazrat Hujjat (a.s.) the title of Qaaem. Thus, Shaykh Ja’far bin Muhammad bin Qulwayh in Kaameluz Ziyaaraat, has narrated from Muhammad bin Humran that he said: Imam Ja’far Sadiq (a.s.) said:
After Husain’s (a.s.) martyrdom, angels arrived weeping and said:
O Lord! This chosen one of Yours is Husain (a.s.), the chosen son of Your Messenger’s daughter.
In response to these words of the angels, Allah Almighty raised the holy shadow of the Qaaem Aale Muhammad (a.s.) and said: I will take the revenge of Husain (a.s.) through this hand.1
In Elalush Sharaae, Shaykh Saduq has narrated from Abu Hamza Somaali that he said: I asked Imam Muhammad Baqir (a.s.): O son of Allah’s Messenger (s.a.w.a.), are all of you not Qaaem bin Haqq?
He replied: Yes, we are.
I asked: Then why Qaaem (a.s.) is called as the Qaaem?
He replied: When my grandfather, Imam Husain (a.s.) was martyred, angels lamented to Allah, the Mighty and the High and said: O our God and our chief, will you let go the one, who has killed Your chosen one and the son of Your chosen one and the selected one of Your creatures?
The Almighty Allah revealed to them: Rest assured, O My angels, I swear by My might and majesty, that I will definitely take revenge from them even though it may after a long time.
Then the Almighty Allah displayed to them the Imams from the descendants of Imam Husain (a.s.) and the angels were pleased by this.
Suddenly they saw that one of them was standing up in prayers. Allah, the Mighty and Sublime said: I will take revenge through this standing one.2
Also, it is the day of the reappearance and advent of Imam Mahdi (a.s.) as Shaykh Mufeed (r.a.) has narrated in Irshaad 3 from Abu Baseer that he said: Imam Ja’far Sadiq (a.s.) said: A caller will call out in the name of Hazrat Qaaem (a.s.) on the 23rd
eve of the month of Ramazan and he will appear on the day of Ashura and it is the day on which Husain bin Ali (a.s.) was martyred.
It is concluded from authentic traditions that among the most important aims of the advent of Imam Mahdi (a.s.) is taking revenge for the killing of his grandfather, Imam Husain (a.s.); on the contrary taking revenge for the tyranny suffered by his progeny and to cure the hearts of the believers; on the contrary the sorrow of angels will not end before that day.
1 Al-Kaafi, vol. 1, p. 456; Al-Amaali, Shaykh Toosi, p. 418; Behaarul Anwaar, vol. 45, p. 221 and, vol. 51, p. 68; Al-Lohoof fee Qatlit Tofoof, p. 74
2 Dalaaelul Emaamah, pp. 451-452; Behaarul Anwaar, vol. 37, p. 294 &, vol. 45, p. 221
3 Al-Irshaad, vol. 2, p. 379