Some of the traditions about this are as follows...

Some of the traditions about this are as follows: Muhammad bin Muslim says: A person asked His Eminence, Imam Ja'far Sadiq (a.s), “When would your Qaim reappeara” He replied, “When misguidance shall be more and guidance less… at such time, with the blessed name of Qaim on the eve of the 23rd of the month of Ramadan a call shall be issued and he would arise on the day of Ashura.” [2] And it is said that the call of the angel is in the month of Ramadan and the reappearance of His Eminence is in the month of Shawwal of an odd numbered year.

[3] [1] Muntakhab al-Athar, Pg. 465, quoted from Kashful Astar, Pg. 181 [2] Kashful Astar, Pg. 181 [3] Yanabiul Mawaddah, Pg. 194 Widespread Power of the Imam of the Time (a.s) His Eminence, the Awaited Imam (a.s) is the first ruler of Islam whose dominion shall stretch from the east to the west and in the world there would be no command without his command.

Ibne Abbas has narrated from the Messenger of Allah (a.s) that he said, “Caliphs, successors and proofs of God on the creatures, after me are twelve persons. The first of them is my brother and the last of them is my (great grand) son.” It was asked, “O Messenger of Allah (a.s)!

Who is your brothera” He replied, “Ali bin Abi Talib (a.s).” He was asked, “Who is your sona” He replied, “Mahdi, who would fill the earth with justice and equity just as it would have been fraught with injustice and oppression.

By the One Who has sent me as a giver of glad tidings, even if a solitary day remains for the tenure of the world, the Almighty Allah shall prolong this day till my son, Mahdi reappears in it, then His Eminence, the Spirit of Allah, Jesus son of Maryam shall descend (from the heavens) and stand to pray behind the Imam and the earth shall be washed in divine light and his rule shall surround the east and the west.” [1] Abu Saeed Khudri narrated from the Messenger of Allah (a.s) that he said, “The world shall not end till a man from my Ahle Bayt (a.s) is at the helm of affairs and fills the earth with justice and equity just as it would have been fraught with injustice and oppression…” [2] Abdullah Ibne Abbas narrated from the Messenger of Allah (a.s) that he said, “Four persons had been absolute rulers on the earth, two were believers and two infidels.