Recognizing the symptoms of the Reappearance
Recognizing the symptoms of Imam Mahdi’s Reappearance is one of the important duties of the awaiting people during the occultation, especially those signs which our Imams have informed us about.
The book Mikyal-al-Makarim
Everyone is needed to pledge allegiance to Imam Mahdi after his Reappearance and this is impossible without having knowledge about the Reappearance.
Imam Sadiq says: "Five symptoms are inevitable before the Reappearance of Imam Mahdi which include: “Yamani, Sufiani, a loud cry from the Heavens, the murder of the pure soul, and the ground subsides in the area of Al-Bayda."
Kamal al-Din and Tamam al-Nimeh, chapter 57
Ayatollah Safi Golpayegani says:
"Recognizing the symptoms of the Reappearance is obligatory."
The text from : islampfr.com
Photo reference : @del_tange_mahdi