A prayer rope (Greek: κομποσκοίνι, Russian: вервица, Romanian: mătănii, Serbian: бројаница, Bulgarian: броеница) is a loop of knots, usually made of wool but sometimes of wood, that is used during praying to keep track of the number of prayers which have been said.
The rope is usually used with the Jesus Prayer: "Lord Jesus Christ, Son of God, have mercy on me, a sinner." Historically it typically had 100 knots, although prayer ropes with 300, 50, or 33 knots or, less commonly, 250 or 12 can also be found in use today. There is typically a knotted cross at one end, and a few beads at certain intervals between the knots. "The purpose is to help us concentrate, not necessarily to count."