His Eminence, Ali bin Musa (a.s)
His Eminence, Imam Reza (a.s) has also given glad tidings to the Muslims that His Eminence, the Remnant of Allah (Baqiatullah) in the earths shall reappear. For example:
a. The poet among the partisans of Ahle Bayt, Dibil Khuzai came to Imam Reza (a.s) and recited a panegyric he had composed regarding the afflictions of Ahle Bayt from Bani Umayyah and Bani Abbas. The opening lines were as follows:
Schools divine verses are bereft of recitation place.
Places of divine revelation are empty and the area has become deserted.
When he reached the lines:
Then if it had not been what I desire for today or tomorrow any heart would have broken in the grief of your signs.
His Eminence raised up his head to listen to what Khuzai hoped. That hope, which if it had not been there, his longings would have killed him. Dibil continued to recite and when he recited:
Advent of an Imam; it would definitely happen.
He will rise in the name of God and come with the bounties. He will differentiate between who is right and who is wrong.
And give recompense for good and bad.
His Eminence, Imam Reza (a.s) began to weep incessantly and turned to Dibil, the poet of the oppressed ones, saying, “O Khuzai! Ruhul Qudus (the angel) has made you recite these two couplets. Do you know who that Imam isa And when he would arise ?”
Dibil replied, “No my master. I have only heard that an Imam from among you shall arise and purify the earth of corruption and fill it with justice.” His Eminence, Imam Reza (a.s) began to introduce the great reformer, His Eminence, Imam Mahdi (a.s) and said:
“O Dibil after me, my son Muhammad shall be the Imam and after him, his son Ali, and after him, his son Hasan al-Askari, and after him, his son, Al-Qaim who shall be the awaited one during the period of his occultation. When he shall reappear, the believers would follow him. Even if a single day remains for this world, Allah, the Sublime and the Mighty, shall prolong that day till he reappears and fills the earth with justice as it has been filled with tyranny. And as for the time of his reappearance, or to forecast about it, indeed, my father has heard from my grandfather and he from his forefathers from Ali (a.s) who says that the Messenger of Allah (a.s) was asked, ‘O Messenger of Allah, when will the Qaim of your progeny arise ?’
He replied, ‘His likeness is to the Hour (Qiyamat), that only the Almighty Allah knows about it and it will arrive all of a sudden.’”
b. Hasan bin Khalid has narrated from Imam Ali bin Musa ar-Reza (a.s) that he said, “One who has no abstemiousness, has no faith and one who has no dissimulation cannot be a believer. And the most honorable of you near Allah, is the most pious; that is one who is most particular about dissimulation.” His Eminence was asked, “O son of Allah’s Messenger, till what time ?”
He replied, “Till the appointed day, and that is the day of the reappearance of our Qaim. Therefore, whoever gives up Taqayyah before the reappearance of our Qaim is not from us.”
His Eminence was asked, “O Son of Allah’s Messenger. Who is your Qaim ?”
He replied, “My fourth descendant. He is the son of the Chief of the slave maids. He shall purify the earth of injustice and oppression. He is such that his birth will be a matter of doubt for most of the people and he shall have an occultation. And when he reappears he would spread light and he would establish the scales of justice among the people and none shall be oppressed. And he is such that he shall encompass the world and a caller shall proclaim from the sky and call the people towards him and all the people of the earth shall hear that call. The call would be as follows:
“Know that! The proof of Allah has reappeared from the side of the House of Allah! Thus follow him. Because the truth is in him and with him. And it is the statement that He says:
If We please, We should send down upon them a sign from the heaven so that their necks should stoop to it.”
And the Almighty Allah has said:
“And listen on the day when the crier shall cry from a near place. The day when they shall hear the cry in truth; that is the day of coming forth.”
“That is the advent of my son, Mahdi Qaim (a.s).”
These were some traditions narrated from Imam Reza (a.s) regarding Imam Mahdi (a.s). The most important point derived from all these traditions is that the Imam of the time shall soon be the source of light of the whole earth.
Ghayatul Maram, Pg. 696
Surah Shoara 26:4
Surah Qaf 50:41-42
Faraidus Simtain, Kifayatul Athar