Arbaeen is a Shia Muslim religious observance that occurs forty days after the Day of Ashura, which commemorates the martyrdom of Imam Hussein, the grandson of Prophet Muhammad.
Arbaeen marks the end of the mourning period for Imam Hussein, and is a time for pilgrimage to his shrine in Karbala, Iraq.
Millions of Shia Muslims from around the world travel to Karbala on foot, making it one of the largest annual religious gatherings in the world.
The journey, known as the Arbaeen pilgrimage, is considered a spiritual and communal experience, with pilgrims providing each other with food, water, and other necessities along the way.
The event is a testament to the enduring legacy of Imam Hussein and his message of social justice, compassion, and resistance against oppression.