Imam Reza (A.S.), the eighth Imam of the Shia Muslims, was a radiant light from the lineage of the Prophet Muhammad (PBUH) and the son of Imam Musa al-Kazim (A.S.). His full name was Ali ibn Musa al-Ridha, and the title "al-Ridha" — meaning "the one with whom God is pleased" — reflects his exalted spiritual station and divine approval.