Hadith Al-Kisa (Narration of the Cloak) is the narration of an incident where the Prophet Mohammed (saw) gathered Ali, Hassan, Hussayn and Fatema (peace be upon them all) under his cloak and announced them as his Ahl (Family). It was then that the second part of verse 33:33 of the Holy Quran was revealed, known as "Ayat al-Tathir" (Verse of Purification), in which Allah states He has purified the Family of the Prophet (Ali, Hassan, Hussayn and Fatema), thus proving their infallibility.
Islamic Elite: Hadith Dua e Had
It is reported from Imam Ja'fer Sadiq (a) that whoever recites this du'a for forty days, after morning prayers will be amongst the helpers of the 12th Imam (a). Should he/she die before the reappearance of the Imam (a), Allah will raise him/her from the grave in order for the reciter of this du'a to present him/herself to the Imam.
As the title suggests, this supplication is of allegiance (ahad) to the holy Imam (a.t.f.s). Its recitation every morning ensures the renewal of this covenant. The reciter finds himself under the leadership of Imam (a.t.f.s).