Abdullah b. Abbas narrates from the Holy Prophet (s.a.w.a.) who proclaimed, ‘After me, my successors and vicegerents on the earth shall be twelve in number. The first among them is my brother, while the last is my son.’ He (s.a.w.a.) was asked, ‘Who is your brother?’ He (s.a.w.a.) replied, ‘Ali b. Abi Talib.’ Then he (s.a.w.a.) was asked, ‘Who is your son?’ The Holy Prophet (s.a.w.a.) replied, ‘Mahdi, who shall fill the earth with justice and equity as it would have been ridden with injustice and tyranny.
Faraaed al-Simtain vol 2 pg 334 trad 562
Abdullah b. Abbas narrates from the Holy Prophet (s.a.w.a.) who proclaimed, ‘…I swear by the One who has raised me as a Messenger, even if a solitary day remains before the world ends, Allah will extend that day to such an extent that my son Mahdi will reappear, and Ruhullah Esa (a.s.) will descend and pray behind him. The earth shall radiate due to their brilliance. Mahdi’s dominion shall be unchallenged, and will encompass the east and the west.’
Faraaed al-Simtain vol 2 pg 334 trad 562
Imam Jafar Sadiq (a.s.) narrated from his immaculate forefathers (a.s.) ending in Ameerul Momineen – Ali b. Abi Talib (a.s.) regarding the creation of the immaculate Imams (a.s.), ‘…it is only through our Mahdi, that Allah’s proof (upon the people) will be exhausted. Indeed he is the seal of Imams and a respite for the nation. He is the fountainhead of light and the master of all affairs. We (the Imams) have surpassed all other creations in excellence, and are superior to all monotheists. We are the Proofs of Allah. One who accepts our mastership (Wilayat) and holds fast to our rope, will find himself overwhelmed with bounties in Paradise.’
Muruj al-Zahab vol 1 pg 32-33 trad 562]
Ibne Abbas relates from the Holy Prophet (s.a.w.a.), who declared, ‘Surely Ali b. Abi Talib is my successor and the Imam of this nation after me. The Qaim, the Awaited One, is from his progeny. He will fill the earth with justice and equity as it had been overwhelmed with injustice and insecurity. I swear by the one who has raised me with the truth, as a Prophet, those who believe in him, while he is in occultation are more precious than red phosphorus.’
Faraaed al-Simtain vol 2 pg 335-336 trad 589 Yanaabi al-Mawaddah chap 94 pg 488
Ibne Umar recounts from the Holy Prophet (s.a.w.a.) who prophesied, ‘There will rise a person from my progeny, who will share my name and my kuniyyah (agnomen). He will establish justice and equity on the earth, obliterating injustice and instability. He is none other than Mahdi.’
Regarding the 159th verse of Surah Anaam (6), ‘On the day when some of the signs of your Lord shall come, its faith shall not profit a soul, which did not believe before, or earn good through its faith. Say: Wait; we too are waiting.’ Ali b. Rabaab narrates from Imam Sadiq (a.s.) who observed, ‘The signs allude to the Imams, while ‘some of the signs’ refer to Qaem, Muntazar. Then the one who has not affirmed Mahdi’s (a.t.f.s.) Imamat before his reappearance, will reap no benefit in doing so later, with the sword against his neck. This will be his fate, regardless of whether he has acknowledged the other Imams (before Mahdi (a.t.f.s.)).’
Yanaabi al-Mawaddah chap 71 pg 422
Jabir b. Abdullah Ansari narrates about a Jew, Jandal b. Janaadah b. Jabeer, who asked the Prophet (s.a.w.a.) – Tell me about your descendants after you, so that I may establish proximity with them. The Holy Prophet (s.a.w.a.) informed him, ‘…Mahdi shall initially be in occultation. His advent shall be marked with justice and harmony, while until then the world would have been wrecked with injustice and tyranny. Then I give glad tidings to the Shias who act with patience and steadfastness, in his occultation, and are firm in their belief and devotion regarding Mahdi. Allah has mentioned them in the Quran thus, ‘(Quran is) a guidance for the pious those who believe in the Unseen.’ (Surah Baqarah (2): 4) and thus, ‘These (belong to) the party of Allah. Know that surely Allah’s party, they are the victorious ones.’ (Surah Maidah (5): 56)
Yanaabi al-Mawaddah chap 76 pg 100-101
Jabir b. Abdullah Ansari narrates regarding the verse, ‘O you who believe! Obey Allah and obey the Apostle and those in authority from among you.’ (Surah Nisa (4): 59) that the Holy Prophet (s.a.w.a.) informed, ‘…(the 11th Imam) Hasan b. Ali’s (a.s.) son will share my name and agnomen. He will be Allah’s emissary on the earth and His concluding proof upon His creatures. He is the one through whom Allah shall subdue the East and the West. He is the one who will remain concealed from his friends and Shias. Only the ones whose hearts have been examined by Allah, will acknowledge his Imamat.’
Yanaabi al-Mawaddah chap 94 pg 170
Abu Hafs b. Ahmad b. Nafe Basri relates from his father, who was an attendant of Imam Reza (a.s.) – Imam Raza (a.s.) narrates from his immaculate forefathers (a.s.) ending in the Holy Prophet (s.a.w.a.) who pronounced – ‘…one who desires to meet Allah, while his faith is flawless and his religion is perfect, should necessarily uphold Mahdi as his master and Imam. Indeed these individuals (Holy Imams a.s.) are beacons of (guidance) in the darkness. Certainly Mahdi is guidance. Then I guarantee Paradise for the one who loves him, and accepts him as his Master.’
Al-Arbaeen trad 4
Allah declares in Hadis-e-Qudsi, ‘One who accepts him (Imam Mahdi a.t.f.s.), is a believer in My estimate, while one who renounces him is a disbeliever in My estimate.’
Al-Arbaeen