the author of «y anabi-ul-muwadda» narrates from the author «jawahar-ul-aqdain» and he, from ali who said:- 'when the 'qaem' from the progeny of muhammad (s.aw.a.) emerges, Allah will gather for him the inhabitants of the east and west.'
the author of «nur-ul-absar» has narrated (on page 231) from ali-ibn-abi talib (a.s.) as such:- 'i asked the messenger of Allah (s.a.w.a.): will Mahdi be from (our) progeny of muhammad or will he be from some other progeny?
he replied: no, he shall be from us. Allah shall bring the religion to completion through his hands just as he expanded it through us. by our blessings they (i.e. the people) shall be released from turbulences just as they got released from polytheism. by our blessings Allah will unite their hearts after conspiratorial animosity just as he united their hearts after polytheistic animosity. by our blessings, they shall turn into brothers in faith after having become enemies to each other.
some of the scholars reckon this tradition to be 'hassan' (acceptable) and superior in the chain of transmitters and the experts in traditions have written them in their respective books. however tabarani has only rememorated books. however tabarani has only rememorated it in his 'mu'ajam' (ausath), abu na'eem has only narrated it in his 'huliat-ul-aulia' and abdur-rahman has only mentioned it in his 'awaali'.(65)
in chapter 2, section 4 of the afore-mentioned book, the author narrates from «mustadrak» of abu abdullah hakem who narrates from umm-salma (peace be upon her) who said: 'the messenger of Allah (s.a.w.a.) said: '«people shall give allegiance between 'rukn' and 'maqam' to the person who is amongst my followers and their number shall match the number of people of 'badr'.
again, in chapter 7 of the same book its author narrates from the book «al-fatan» of na'eem-ibn hemad who narrates from abu huraira as such: 'allegiance will be given to Mahdi between 'rukn' and 'maqam' without a person being awakened from his sleep nor a drop of blood being shed.