Iranian First Vice President Eshaq Jahangiri appreciated the Iraqi government for maintaining the safety of the Iranian pilgrims taking part in the Arbaeen rallies marking 40th day of mourning for Imam Hossein (PBUH) after he was martyred on the day of Ashoura over 13 centuries ago.
"We express our gratitude to the government and nation of Iraq for their warm receiving of millions of Arbaeen pilgrims," Jahangiri said in a telephone conversation with Iraqi Prime Minister Haider al-Abadi.
He underlined that the Arbaeen mourning ceremony is one of the largest religious gatherings in the world.
People in Iran and other countries throughout the world mourned on Arbaeen (40th day of mourning for Imam Hossein after he was martyred on the day of Ashoura over 13 centuries ago).
Millions of Muslims in Iraq who rallied from the city of Najaf to the city of Karbala arrived in Karbala city on Sunday to mark the Arbaeen.
Over 20 million of Muslims from across the world, including Iran, attended the 100-km rally, while hundreds of thousands more joined them on the way to Karbala and to the holy shrine of Imam Hossein (PBUH).
Observers believe the rally is unique in terms of quality and also the number of its participants. It started from the holy shrine of Imam Ali (PBUH) - the first Shiite Imam - and ends up in the holy shrine of Imam Hossein (PBUH).
Large numbers of different student and popular groups are still joining the rally.
In October, Shiite pilgrims of Iraq and other countries, including Iran, flocked into Karbala, some 100 km South of Baghdad, and into Kadhmiyah in Northern Baghdad to commemorate Ashoura, which marks the martyrdom of Imam Hossein (PBUH), grandson of Prophet Mohammad (PBUH) and the third Shiite Imam.
Imam Hossein (PBUH) was martyred in the 680 A.D. battle fought on the plains outside Karbala, a city in modern Iraq that's home to the Imam's holy shrine.
In the battle, Imam Hossein (PBUH) was decapitated and his body mutilated by Yazid's armies. All of Imam Hossein's male family members, relatives, friends, soldiers who all together formed a 72-member army were beheaded in an unequal war with a 30,000-strong army of the enemy in the desert of Karbala.
The occasion is the source of an enduring moral lesson for the Shiites.
Imam Hossein's martyrdom - recounted through a rich body of prose, poetry and song - remains an inspirational example of sacrifice to Shiites, who make up a majority of the Muslim population in Iran, Pakistan, Iraq and Bahrain.