Millions of Iranian pilgrims gathered at the Imam Reza (AS) holy shrine in Mashhad to commemorate Arbaeen, a significant mourning period for Shia Muslims. The observance marks forty days after the martyrdom of Imam Hussein (AS), the grandson of Prophet Muhammad. Pilgrims traveled from across Iran to pay their respects and participate in religious ceremonies at the revered shrine. This annual pilgrimage demonstrates the deep faith and devotion of Iranians to Imam Hussein and the Ahl al-Bayt (family of the Prophet). Authorities ensured the safety and smooth flow of visitors during this important religious event. The Arbaeen commemoration is one of the largest religious gatherings in the world, attracting millions of worshippers annually. It signifies remembrance, reflection, and renewed commitment to the principles of Islam.