Vidi aquam
Vidi aquam is an antiphon, which may be sung before the Tridentine Mass on Sundays, or either before or at the beginning (in place of the Penitential Rite) of the Mass of Paul VI according to the 2002 rubrics. It accompanies the Asperges, the ritual at the beginning of Mass where the celebrating priest sprinkles the congregation with baptismal water.