Waiting for the appearance of God’s Proof indicates to the “existence” and ”appearance” of Imam Mahdi (AJ) and these are mentioned in the holy Quran and the narrations from infallible Imams (AS). In Ayah 93 of Surah Al-Hud, Allah (SWT) says: “Wait as I am waiting like you”. In his commentary about the above holy verse, Imam Reza (AS) mentioned that, waiting for Imam Mahdi (AJ) will bring relief and tranquillity [1].
[1] Al-Mizan, pages 393-394.
source : shafaqna