Similar hadith can be referred to the report of Imam ÑAli b.

Similar hadith can be referred to the report of Imam ÑAli b. Ùalib who heard from the Prophet (pbuh) in which he said,

When there is only one day left Allah will send a person from us (family of the Prophet) and the world will be overwhelmed with justice as previously was full of injustice.
Again, this is the tradition which directly mentions al-mahdi as narrated by Imam ÑAli b. Abi Ùalib who heard from the Prophet in which he said, Al-mahdi is from my family in which Allah will settle the problem of the ummah in one night.
In more explicit way, Imam ÑAli b. Abi Talib ever said to Abu Ishak while he was looking to his son, Hassan, in which he said, This is my son known as master (sayyid) as the Prophet gave that name. Through him will come out a person whose name is the same like the name of your Prophet (pbuh) and possess similar character. The world will be full of justice.

This is the hadith which clearly mentions that al-mahdi will come from the son of Fatimah as narrated by Um Salmah who heard from the Prophet (pbuh) said, \'Mahdi is from my family (ÑatratÊ) from the son of Fatimah\'. It is also mentioned that al-mahdi will come from the east without naming particular place. This is the report of Ibn MasÑud who narrated his experiences when he was sitting with the Prophet (pbuh) in which he said, When we were with the Prophet (pbuh), then, a group of youth from Bani Hashim came and when the Prophet saw them, his eyes were in tears and the color of his face changed. Then I asked, we notice on your face as if there is something that you may dislike. We are the family who preferred the life in the hereafter than living in this world. And my family will witness after I demise, the great test of expulsion until the people from the East arrive bringing the black flag. They ask goodness of charity and they never give rather they fight against them. Later on, they were given the victory and then, people offer what they want but they refuse until they pay it to a person from my family who arrive to this world to establish justice as it was the full of misery before. Then, whoever witnesses him, please come although with difficulties.
This following tradition mentions about the word khalifah al-mahdi which will come out, again, from the East. It is mentioned by Ibn Majah in his book as narrated from Thawban in which the Prophet (pbuh) said,

Three from your treasure will be exposed for killing. All of them are son of khalifah and one of them will be saved. Then, people from the East with black flags appear to fight severely against you which I could not imagine about it. If you see that person just follow him even if you have to face difficulties as he is khalifah al-mahdi. In one source we found that the emergence of al-mahdi is related with the attitude of unjust ruler who exploited the rights of people. This is mentioned by al-Timid on the report of Abu Hurayra who heard from the Prophet (pub) said, At the end of the day, my ummah will be given the severe test from their rulers until it is felt as if the whole land is so small. In that situation, Allah will send a person from my family to overwhelm with justice replacing ruthlessness and injustice. All inhabitants of the heaven and earth feel satisfied and everything that stored inside the earth will be brought out and no single drop from the heaven except to be sent it down. He lives in the midst of people for seven, eight, or night years.

In one evident it is said that al-mahdi will come out whenever good people are killed which will cause the anger from the inhabitants of the heaven as narrated by Mohair who heard from one of the companions of the Prophet (pub) who said, One of the companions of the Prophet (pub) spoke to him that al-mahdi will not come out until good people (al-nafs al-zakiyyah) are killed. Whenever they are killed the inhabitants of the heavens get angered as well as those who live on earth. Then, people will come to al-mahdi and endear him like the new married person endears his wife. Al-mahdi will overwhelm the whole earth with justice and the earth will produce fruits from all plantations and the heaven (al-sama) will pour its rain and my ummah will enjoy the bounties which they never experienced it before.
Having looked at the different narration with regard to the arrival of al-mahdi, then, Imam al-Shawkani came to the conclusion that all hadith related to al-mahdi al-muntazar, al-dajjal, and the coming down of the Prophet Isa, the son of Mary, from the heaven reach the level of authenticity known as al-mutawatir.

Mahdi and Imamate Order
We have seen in various sources that Mahdism is intermittent with the governance based on justice which will emerge in the midst of crisis. The sources do not give the details rather just mention in general that a selected person with positive characters would become the source of blessing and savior of the ummah. The imamate government in Islam is imperative in which without it there will not be any prevalence of justice. Since the death of the Prophet (pbuh) there were governments under caliphate system to unite the potentials of the ummah. Imam ÑAli (may Allah be peace with him) for instance, gave strong warning that one day of the ummah will encounter the crisis which can only be handled through the structuring the values of the divine message into the good order (al-nizam). Structuring the values must be done both in individuals and the collective level through the establishment the sound of governance. The absence of the viable governmental order based on the divine guidance will only create the chaos. In view of this, the warning as given by the fourth caliph says, \'The truth (al-haq) without good governance will be easily defeated with truth which is orderly structured,’ is always relevant.

Since the inception, the message of all Prophets was aimed at establishing peace and justice which ultimately to dedicate the whole of activities of human beings to the will of Allah. The actualization of such noble attempt cannot be done without struggle to eradicate evil forces. In the eve of the creation of Adam for instance, Allah informed the Angle Gabriel on the enmity and bloodshed among human beings. Those who are concerned to promote goodness to invite others to turn into the divine guidance to achieve happiness and peace in the community are categorized and khalifah (lit. vicegerent) as the initial purpose of creation as mentioned in this evident,
Behold, Thy Lord said to the angels: "I will create a vicegerent on earth." They said: "Wilt Thou place therein one who will make mischief therein and shed blood?- whilst we do celebrate Thy praises and glorify Thy holy (name)?" He said: "I know what ye know not."
Khalifah is related with the emergence of selected people who were later appointed as Prophets and Messengers with the special task of conveying the message. It could also be in the form of ordinary human beings who are governed with the divine message and categorized as martyrs (al-shuhada), faithful people (al-sadiqun), pietistic people (al-salihun), saints (al-awliya), men of goodness (al-abrar), as well as Muslim scholars who devote their lives for the cause of goodness (Ñulama al-Ñamilun).

Allah SWT did not want to leave human beings without guidance. The Prophet Adam as the first human being was reminded on emerging mischievous deeds (fasad) on earth and after the expulsion from the paradise Allah advised him to observe the revelation to save their life. This, among other things, can be seen in these following verses, We said: “Get ye down from here; and if, as is sure, there comes to you guidance from Me, whosoever follows My guidance, on them shall be no fear, nor shall they grieve.

Both Shiite and Sunni share the belief on Islamic order based on the divine message. The first, from the inception, is very much concerned with the imamate system although there are differences of opinion with regard to the interpretation of the textual evidences pertaining to the appointment of an imam to govern people based on the dictum of the revelation in which, according to them, only Allah has the right to appoint him. While the later could be in any form which includes the caliphate government with the application of the SharÊÑah. As far the issue is concerned, al-mahdi also is related with the caliphate system known as khalifah al-mahdi as mentioned, among other things, in the hadith narrated by Ibn Majah in which he said, fi iza raytumuhu fatabiÑuhu walaw habaw Ñala al-thalj fainnahu khalifatullah al-mahdi (whenever you have seen, just follow him even you face difficulties as he is the caliph of God who have been granted with guidance).
The khalifah al-mahdi who will be the savior of humanity at the end period of the world will be remaining with the ummah within seven or eight years to demonstrate peace, justice, and prosperity of the ummah with the wise leadership based on the divine guidance. The ummah will retain the lost dignity and there will not be any other forces either religious or ideological used to dominate the Muslim ummah. The Rome will be conquered, Jewish and Christian hegemony will be tarnished, and no other forces will be in position to challenge the leadership of al-mahdi.

Religious Reformers
The arrival of Imam al-Mahdi indicates the end of worldly live which will be proceeded with internal crisis of the Muslim ummah due to the diversity of doctrinal affiliation, challenges of other religious adherents i.e. Judaism and Christianity as well as subservient to unbeliever forces who subscribe to man-made ideological system i.e socio-economic and political which lead into the bankruptcies and exploitation. It is as a matter of fact, most evidences on al-mahdi are related with internal and external challenges. The first is due to the deviation of Muslims from the mainstream of the belief, selfishness, moral degeneration, and demise of socio-economic solidarity, diversity of school of thought, irreconcilable conflict, ruthlessness and injustices of Muslim rulers. In addition, it is also partly related to incompetence in the field of science, technology, and management. The second is due the influence of Western ideological belief such as pseudo democratic system, Western economic domination, political interference and the military onslaught against Muslims. We have to be aware that before the arrival of al-mahdi which becomes the expectation of Muslims, the Prophet Muhammad (pbuh) whose leadership style will be manifested in the hand of al-mahdi also ensures the arrival of revivalists and reformers who will emerge at the turn over of every century as reflected in the tradition, At the first part of each century, Allah will send a person who will make reform of His religion.
he role of those who are known as religious reformers is, among other things, to revive religious practice which has been ignored by people, giving spiritual guidance, exposing the religious tenets which ensures peace, justice, and balance of lives, and to remind the ummah with viable religious doctrine throughout the time and to make sure that Islam covers the whole gamut of human activities i.e. spiritual, socio-economic, political and governmental affairs.

From the Shiite circle the world witnessed the emergence of charismatic leader, Ayatollah Ruhullah Khomeini, the greatest and the most influential Shiite reformer who, at the end, brought about an Islamic republic of Iran based on the divine system. As other religious reformers, Imam Khomeini emerged with bold resistance on the recalcitrant and injustices in the hands of Emperor Shah Pahlevi. The echo of reviving Islam in the hands of Imam Khomeini was obstructed by the then ruler and expelled him from his homeland. Due to his sincere works for the cause of justice, some scholars regard that he possesses the value characters of Mahdism.
Until then, the fame and examples of leadership, and depth of his knowledge he came out with the theory of sultah wilayah al-faqih which is very distinctive. According to him, since the arrival of al-mahdi is a part of the invisible matter in which both Sunni and Shiite share the belief on the arrival, then, we should not be over obsessed about the time of emergence. Muslim should never think to stop doing the collective work simply because the absence of imam rather to actualize the values of justice which would be brought about by al-mahdi in handling the problems of the Muslim ummah. To shed more light we quote the statement of the late ayatollah Khomeini in which he said,
It already passed more than a thousand year on the absence of Imam al-Mahdi and even it may take more thousands years to handle the ummah in the hands of awaited imam. During the waiting the process, the status of Islamic law should not be in stalemate which causes people to do as they wish? Do you think such condition could only create havoc? Do we want to make Islam lose simply because the absence of imam al-mahdi? For me, to support this idea is worse than to believe that Islam is abrogated.

We should be very concerned in the absence of the Imam al-Mahdi in undertaking the task of establishing justice. The absence of an Imam al-Mahdi should not be discerned in the sense that we could not run an Islamic government due to the absence of the Prophet (pbuh) or the absence of the person who was given the will (al-wasiyyah). Again, we quote imam Khomeini statement in which he vividly mentions the role of wilayah al-faqih,

The government represents the crystal operation of futuristic oriented fiqh in dealing with all aspects of socio-political, military, and culture. The existence of fiqh can be regarded as comprehensive theoretical reality in running the human society from the cradle to the grave. Moreover, as the founder of Iranian revolution, his aloofness from political interest is obvious. He devoted the whole of his activities for the cause of peace, justice, and prosperity of the nation. To my humble knowledge about political situation in Iran, at present, none of the relatives of the late ayatollah Khomeini involves in pragmatic political interests. While from Sunni we found Imam Hassan al-Banna who became martyr in the hands of Western agent. His thought and ideas brought tremendous influence throughout the Muslim world. From inception he showed antagonism toward hegemony of Western ideological system and civilization which started from colonial period. As other Muslim reformers he faced a lot resistance especially from the despotic ruler which caused, at the end, to his assassination. The death of such person did not mean the extinction of ideas which were laid down during his lives as continual process of conveying the message which ultimately leads into the application of the divine law to achieve peace and balance of human lives.

The emphasis of da\'wah of Muslim Brethren is cooperation with other organizations until the establishment of an Islamic government. Then, it is worth noting the view of its founder, Hassan al-Banna\' in which he reiterated the policy of his organization toward others in which he said, Our standpoints toward other all Muslim organizations which have different forms and orientations is based on the view of love, brotherhood, cooperation, and maximum effort to come closer in terms of thought (wijhat al-nazr) and bridge the differences to assist establishment of the truth in the spirit of cooperation (al-taÑawun) and love (al-Íub). We should not be separated because of different school of thought (mazhab) as the religious of God brings the characters of moderation (yusr) and it will no look strange unless a person is defeated when a person does not posses true vision. God has made us to adopt an ideal strategy with the use of moderate approach (uslub al-layyin). I am sure that the day will come in which the differences of names of organization will diminish to replace the psychological gap and there will not be any groups except all of them are brother not necessarily to be members of Muslim Brethren.