The author of Yanabi-ul-Mawadda narrates from Shaikh...
The author of Yanabi-ul-Mawadda narrates from Shaikh Mohyiddin Arabi from his book Fotouhat-Makkiyah (chapter 366) about Mahdi (AS) and his ministers and says, "The Mahdi (AS) will emerge when religion would be on the decline. The one who would not accept will be killed and the one who would engage in debate with him will be defeated. He will so reveal the realities of religion that had the Holy Prophet (s.a.w.a.) been alive, be too would have judged in the same manner.
He will eradicate the (false) religions from the face of the earth. Then, except for the pure religion, no other religion would remain over the earth." This Hadith clearly indicates the religion of Islam will be revived and that the basis of the rulership will be religion. This is because the truth of Islam will be made obvious by the 12th Imam (AS) and the only way to success will be through Islam - because that is the way that Allah (SWT) has charted out for humankind.
The author of Yanabi-ul-Mawadda also narrates from the book "Manaqib" which narrate from Imam Ali-ibn-Musa Ar-Ridha who narrates from his father that the Messenger of Allah (SAW) while mentioning the virtues of his household and his Mi'raj (ascension to heaven) said: I asked: "O my lord, who are my legatees?" I heard a call saying: "O Muhammad (SAW)! Your legatees are those whose names have been written on the enclosure of my throne." "I looked and saw twelve lights.
A green cover spread over each light and the names of my legatees were written on each of them where the first of them was Ali and the last of them Mahdi (AS). I asked: "O lord, are they the legatees after me?" I heard a call saying: "After you, they are my friends, chosen ones and proofs upon my creatures. They are your legatees. I swear by my glory and majesty that I will cleanse the earth from its tyranny by the hands of the last of the one who is Mahdi (AS).
I will make him conquer the east and west. I will make the wind to conquer for him and make the clouds submissive to him. I will grant him power through some means and will help him by means of his own army. I will assist him through the angels until he gains power over my government and gathers the people towards my Tauheed (monotheism). Thereafter, I will expand his and extend the days for my friends until the day of judgement.
This Hadith indicates that the Imam (AS) will rule the entire world and that Allah (SWT) will support him in every way.