Sigmar's Walk

As the seat of the Empire and “birthplace” of Sigmar's rule, Altdorf has numerous festivals and holidays dedicated to Sigmar’s name. Sigmar's Walk is the name given to the holiday in which his cultists follow the footsteps walked by their patron god as he left the city nearly 2,500 years prior. On this day--the fifteenth of Sigmar-Tide--cultists of Sigmar take to the streets in a form of pilgrimage, walking from one end of the city to the other until they reach the Gate of the Emperor. During this walk, the cultists chant, pray, and strike their backs with chains, whips, and other painful scourges to cleanse their bodies and spirits of evil and to show their devotion to Sigmar. With the thousands of cultists that participate in this rite, the streets often run red with the blood cascading from their backs. Those on the wayside throw flowers on the cultists as they progress and offer water for those that fall during the journey.

Source

 * Warhammer Fantasy RPG 2nd ED -- Tome of Salvation 147