litany

Litany, in Christian worship and some forms of Jewish worship, is a form of prayer used in services and processions, and consisting of a number of petitions. The word comes through Latin litania from Ancient Greek λιτανεία (litaneía), which in turn comes from λιτή (litḗ), meaning "supplication". Christianity Western Christianity This form of prayer finds its model in Psalm 136: "Praise the Lord, for he is good: for his mercy endures for ever. Praise ye the God of gods . . . the Lord of lords . . . Who alone doth great wonders . . . Who made the heavens", etc., with the concluding words in each verse, "for his mercy endures for ever." The Litany originated in Antioch in the fourth century and from there was taken to Constantinople and through it to the rest of the East...From Constantinople the Litany was taken to Rome and the West. Josef Andreas Jungmann explains how the Kyrie in the Roman Mass is best seen as a vestige of a litany at the beginning of the Mass, like that of some Eastern churches.