The Liturgy of the Hours, or Divine Office, sanctifies the day with prayer at set times, from the night office through lauds, the little hours and vespers to compline. Benedict called it the work of God, to which nothing is to be preferred. Monks traditionally recite all hundred and fifty psalms each week.
Liturgy of the Hours
The daily cycle of prayer at fixed hours, chiefly of psalms, sung or recited by monks and clergy.
Also: Divine Office, Opus Dei