Love and unity will prevail in the time of Hazrat Mahdi (as)

Just as Allah has freed them from the heresy of ascribing partners to Him through us and has placed friendship and love in their hearts and made them brothers in religion, so He will save them from the sin of corruption through Hazrat Mahdi (as) and will make them brothers to each other. (at-Tabarani, al-Haythami, Vol. VII, p. 317; Nu’aim ibn Hammad,  52b; Al-Muttaqi al-Hindi, Al-Burhan fi Alamat al-Mahdi Akhir az-Zaman, p. 20)

Allah will give life to the Sunnah through one of my sons Muhammad ibn Abdullah [Hazrat Mahdi (as)]. His justice and plenty will ease the hearts of believers. He will bring friendship and love to the Persian and Arab nations. (Al-Muttaqi al-Hindi, Al-Burhan fi Alamat al-Mahdi, p. 66)

In the same way that through us they were freed from heresy and ascribing partners to Allah and placed friendship and love in their hearts, so it will be again (when Hazrat Mahdi (as) comes). (Al-Muttaqi al-Hindi, Al-Burhan fi Alamat al-Mahdi, p. 20)