The Friday dhikr of the Sammaniya Sufi sect, led by Shaykh Hassan Qariballah in Omdurman, Sudan. Dhikr or zikr (literally "remembrance") is a Sufi practice in which the names of God or Qu’ranic phrases are chanted as a means of prayer and meditation, here accompanied by jumping in unison. Each Sufi sect, or tariqa, has its own version of dhikr. The uniform of this sect includes Sam Browne belts as formerly used in the British Army.