In active religious use

A string of beads, moved one at a time through the fingers while a fixed prayer or a sacred name is repeated, is not one tradition's invention passed to the rest. It is a counting technology several traditions reached for independently, or adapted along the trade and pilgrimage routes that carried more than goods. The Hindu and Buddhist japamala, most often strung to a hundred and eight beads, counts repetitions of a mantra and is attested across South and East Asia for well over a thousand years, carried into Japan and China as the juzu and the nianzhu. The Islamic misbaha counts the ninety nine names of God recited after prayer. The Christian rosary, whose fixed form is traditionally associated with the Dominican Order, formalized a much older practice of counting repeated prayers on a knotted cord that the Desert Fathers of Egypt had already kept centuries earlier.

None of the three theologies of what the repeated words accomplish resembles the others closely, yet all three settled on the same physical answer to the same practical problem, keeping count of a repetition too long to track by memory alone. That convergence, on beads specifically rather than on notches, knots or tally marks generally, is itself part of what the study of material and lived religion treats as worth explaining, since a technology this simple had more available solutions than the traditions that use it actually chose between.