Participant in a Sufi gathering. Omdurman, Sudan.

Young Sufi devotee sports a tiger-print mantle at the weekly Sufi gathering in Omdurman, Sudan.

Participant of the Sufi gathering dances waving a traditional Sufi stick. Omdurman, Sudan.

People perform Zikr – a religious Sufi ritual that involves dancing and chanting religious texts. Omdurman, Sudan.

Every Friday afternoon hundreds of Sufis gather at Hamad El Neel cemetery. Omdurman, Sudan.

Sudanese brothers in Abu Haraz, Sudan.

Men and women dance in front of a Sufi tomb in the village of Abu Haraz, Sudan.

Khatmiya mosque with Taka mountains in the background. Kassala, Sudan.

Men wave wooden sticks as they approach the Khatmiya mosque. Kasala, Sudan.

Young Sufi adherent in the Sufi festival in Kasala, Sudan.

The word Zikr in Sudanese Arabic means remembrance of God.

Participant in the Sufi gathering. Omdurman, Sudan.

Sufis kneel for an evening prayer. Omdurman, Sudan.

Portrait of a young Sufi devotee observing the evening prayer from above. Kassala, Sudan.

Hundreds of Sufi devotees participate in the evening prayer. Kassala, Sudan.

A man walks in Hamad El Neel cemetery where the weekly Sufi gatherings take place. Omdurman, Sudan.

People sing and pray as they sit among the tombstones. Omdurman, Sudan.

Sufi tombs near the village of Abu Haraz, Sudan.

Various tribes arrive at the festival of Sufism in Kassala, Sudan.

A young boy prays at the crumbling Khatmiya mosque. Kassala, Sudan.

Esfand is being burned during the rituals. Omdurman, Sudan.

Music continues way past midnight around Hamad El Neel mausoleum. Omdurman.

Man holds his prayer beads. Omdurman, Sudan.

Sufis play Daf - a large-frame drum native to the Middle East and Africa.

Men pray inside the Sufi tomb in Abu Haraz, Sudan.

Women and men inside visit their beloved saint at a Sufi tomb in Abu Haraz, Sudan.

People arrive from all corners of Sudan to take part in the Sufi festival in Kasala, Sudan.

Sufi tribe shows off their traditional sharp-as-a-razor sword. Kassala, Sudan.

Sweat covers the faces of the most passionate dancers. Kassala, Sudan.

Kids observe the festivities from the foothills of the Taka mountains. Kassala, Sudan.

Sufis gathered around Hamed El-Nil mausoleum listen to the songs echoing from the inside. Omdurman, Sudan.

Drums kick off the weekly Sufi gathering in Hamad Al Neel cemetery. Omdurman, Sudan.

Man holds a traditional Sufi stick. Omdurman, Sudan.

Songs echo inside the Sufi tomb in Abu Haraz, Sudan.

Worshipers sing traditional Sufi songs. Kassala, Sudan.

Crowds gathered around Khatmiya mosque. Kasala, Sudan.

Kids play at the foothills of the Taka mountains. Kasala, Sudan.

Delivery of fresh drinking water for the participants of the Sufi festival. Kasala, Sudan.

Worshipers sing traditional Sufi songs. Kassala, Sudan.

Sufis enjoy a drink of water. Kassala, Sudan.