On the ten small (Hail Mary) beads of each decade, pray: "For the sake of His sorrowful passion, have mercy on us and on the whole world." After five decades to conclude, pray three times ...

Repetitive prayer is a common thread across many faiths. For Catholics, the rosary involves reciting the "Our Father" once and the "Hail Mary" 10 times, repeated five times over. Each "decade" of ...