Salam Ya Mahdi II Salam Ya Mahdi 

This is a children's hymn about the promised savior. His name is Imam Mahdi. The twelfth Imam of the Shiites and a descendant of the Prophet of Islam, who will appear and destroy oppression in the whole world and establish a unified government in the whole world.
This imam in occultation is the twelfth imam, Muhammad, son of the eleventh imam, Hasan al-Askari. According to the Twelvers, the Mahdi was born in Samarra around 868, though his birth was kept hidden from the public. He lived under his father's care until 874 when the latter was killed by the Abbasids.
song credit : Hijazi, Lebanon