Every year, the southern Lebanese city of Nabatieh draws worshippers from across the country to commemorate Ashura. The name comes from the Arabic "ashara" (ten) and designates the tenth day of Muharram, the first month of the Islamic calendar. For Shia Muslims, this day recalls the massacre of Imam Hussein, his family and his companions at Karbala on 10 October 680 by the troops of the Umayyad caliph Yazid I. In Nabatieh, often nicknamed "the city of Imam Hussein", the ritual takes the form of the darb, a procession in which many participants shed their own blood through self-flagellation, a practice kept up in few places in Lebanon. This photo essay documents it in detail.