The Holy Prophet (S) said,
"Al Al-Mahdi is from my progeny. His name is the same as my name. And his kuniyah is the same as my kuniyah. In his physique and character he looks exactly like me. He will be in a state of occultation and there will be confusion (Hayra) in which people will wander about (deviate). Then he will come forth like a sharpy shooting star to fill the earth will justice and equity as it was filled before with injustice and inequity." 1
Imam Muhammad Al Baqir (‘a) said,
"Certainly in the Qa’im of the Progeny of Muhammad (S.A. W.S.) is the similarity to five prophets, Yunus Ibn Mutah, and Yusuf Ibn Yaqoob, and Musa, and Isa and Muhammad, salawatu Allahi alayhim"
Thus, his similarity to Yunus Ibn Mutha is his reappearance after Ghaybah. He looked like a young man in spite of his advanced age. And, his similarity with Yusuf Ibn Yaqoob (‘a) is his Ghaybah when he was away from the sight of the general, as well as the special people; due to the fear of his brothers.
His affair was hidden from his father. And in such a condition when there was no distance between his father and family and his friends. And his similarity with Musa (‘a) is persistent fear, and his prolonged Ghaybah and a secret birth, and the fervent pleas of his Shi’as after him, and his return by the permission of Allah, and his assistance by the people in subduing of the enemy.
And his similarity to Isa (‘a) is the controversy among the people with regard to him. A group of them says; 'He is not yet born.' Another group says, "He is dead” and some say: "He was killed and crucified,"
And his similarity with his own grandfather, Mustafa (S), is his advent with the sword. He shall slay the enemies of Allah and the Holy Prophet (S), and the unjust, and the tyrants."2
Imam as-Sajjad (‘a) said,
"In the Qa’im is a similarity to Nuh (‘a) and that is his long life."3