Opinions of Some Muslim Saints
Now I would like to present a few quotations from the writings and utterance of a few old Muslim saints reflecting on the practices and the name of the Jama'at of the followers of Mahdi and Messiah.
Hadhrat Ali (RA) said 
"Mahdi Maoud will be colored with the glory of Muhammadiyya and will have the wealth of Ahmadiyya."
Hadhrat Muhammad bin Faris Misri wrote :
"Our scholar will be prophet and from among those who call towards the truth he will have the station of messengership and our A'arif will be in the period of Ahmadi, will be from among oolulazm (those who have strong determination) and will receive greatness."
Hadhrat Mujaddid Alif Thani wrote :
"Around one thousand and some years after the sad demise of the Holy Prophet (peace be upon him), the Haqeeqate (truth) Muhammadiyya will ascend from its station and will unite with the place of Haqeeqate (Truth) Ka'aba. At that time Haqeeqate Muhammadi (Muhammadi Truth) will be called Haqeeqate Ahmadi (Ahmadi Truth)."
Hadhrat Imam Ali Al-Qari wrote :
"so among seventy three sects all of them will be in fire and the Firqah Najiyya (sect deserving paradise) will be the one among ahle sunna (Sunnis) which will have the glory of Muhammadiyya and will be following the holy Tareeqatul (practices of) Ahmadiyya."
Hadhrat Abdur Raheem Grohri wrote :
"Hadhrat Mahdi Maoud has the Muhammadi appearance and will descend like a leader, he will have a mole near one of his eyes. He will re-establish din-e Ahmadi (the Ahmadi practices), our sahib will be bright like the sun and beloved of all. He will be learned, wise, king of wisdom and an eternal saint. O mir Muhammad Sahah! Mahdi will be decorated with the turban of prophethood."
All the above Muslim saints and Sufis understood that at the time of Mahdi Tareeqatul Ahmadiyya will be re-established and thus the followers of the true Mahdi will be practicing the Ahmadiyya Glory of Islam or will be called Ahmadiyya firqah..