Muslim pilgrims used the early morning hours Monday to perform the second day of the symbolic stoning of the devil, as noontime summer heat caused heatstroke among thousands wrapping up the Hajj pilgrimage.

The final days of the Hajj coincide with Muslims around the world celebrating the Eid al-Adha holiday.

The stoning of the pillars representing the devil takes place in Mina, a desert plain just outside the city of Mecca in Saudi Arabia. A third stoning is scheduled Tuesday, before the Farewell Tawaf, or circling the cube-shaped Kaaba in Mecca.

The Hajj pilgrimage is one of the Five Pillars of Islam. All Muslims are required to make the five-day Hajj at least once in their lives if they are physically and financially able to do so.

More than 1.83 million Muslims performed Hajj in 2024, slightly less than last year’s figure of 1.84 million, according to Saudi officials.

The Hajj rites largely commemorate the Quran’s accounts of Prophet Ibrahim, his son Prophet Ismail and Ismail’s mother Hajar — or Abraham and Ismael as they are named in the Bible.

The rites have taken place under the soaring summer heat, which is expected to reach 49 degrees Celsius (120 degrees Fahrenheit) in Mecca and the sacred sites in and around the city, according to the Saudi National Center for Metrology.

More than 2,760 pilgrims suffered from sunstroke and heat stress on Sunday alone at the start of the first round of stoning, according to the Health Ministry. Jordan announced Sunday that 14 Jordanian pilgrims died from heatstroke during the Hajj.

Muslims across Asia celebrate Eid al-Adha, send prayers and aid to Gaza

The number of pilgrims on the roads leading to the pillars Monday morning decreased significantly, compared to Sunday's rites. Security forces, medics and first responders have been deployed in and around Mina, especially on roads and open areas to help pilgrims.

“I am really impressed by the preparations,” Sani Abdullah, a Nigerian, told The Associated Press, adding that he was used to such burning heat in his country. “I have never encountered any problems. Everything is going smoothly.”

Mina is where Muslims believe Ibrahim’s faith was tested when God commanded him to sacrifice his only son Ismail. Ibrahim was prepared to submit to the command, but then God stayed his hand, sparing his son. In the Christian and Jewish versions of the story, Abraham is ordered to kill his other son, Isaac.

The stoning began Sunday, a day after the pilgrims visited the sacred Mount Arafat where they spent their day in worship and reflection. The ritual in Mount Arafat, known as the hill of mercy, is considered the peak of the Hajj pilgrimage.

The pilgrims collected the pebbles, which they have used in the symbolic stoning of pillars, from Muzdalifa, an area located a few kilometers (miles) away from Mount Arafat.

The Hajj is one of the largest religious gatherings on earth. The rituals officially started Friday when the pilgrims moved from Mecca’s Grand Mosque to Mina, then to Mount Arafat. They then return to Mina, where they spend up to three days, each casting seven pebbles at three pillars in a ritual to symbolize the casting away of evil and sin.

While in Mina, the pilgrims visit Mecca to perform a “tawaf,” or circumambulation, which is circling the Kaaba in the Grand Mosque counterclockwise seven times. Then another circumambulation, the Farewell Tawaf, will mark the end of the Hajj as pilgrims prepare to leave the holy city.

Once the Hajj is over, men are expected to shave their heads, and women to snip a lock of hair in a sign of renewal.

Pilgrims commence the final rites of Hajj as Muslims celebrate Eid al-Adha

Most of the pilgrims then leave Mecca for the city of Medina, about 340 kilometers (210 miles) away, to pray in Prophet Muhammad’s tomb, the Sacred Chamber. The tomb is part of the prophet’s mosque, which is one of the three holiest sites in Islam, along with the Grand Mosque in Mecca and the Al Aqsa Mosque in Jerusalem.

This year’s Hajj came against the backdrop of the devastating Israel-Hamas war, which pushed the Middle East to the brink of a regional conflict.

The war has killed more than 37,000 Palestinians in the besieged strip, according to Gaza health officials, while hundreds of others have been killed in Israeli operations in the West Bank. It began after Hamas-led militants attacked Israel on Oct. 7, killing about 1,200 people and taking around 250 hostage.

Palestinians in the Gaza Strip weren’t able to travel to Mecca for the Hajj this year because of the closure of the Rafah crossing in May, when Israel extended its ground offensive to the city on the border with Egypt.