- a part of a psalm with antiphon recited by the celebrant of the Mass at the foot of the altar and, at High Mass, sung by the choir when the priest begins the Mass.
- a psalm or anthem sung as the celebrant of the Holy Communion enters the sanctuary.
- a choral response sung at the beginning of a religious service.
- a short prayer said or sung as the celebrant is entering the sanctuary to celebrate Mass or Holy Communion
