Vidi aquam


Vidi aquam is the name of an antiphon, which may be sung during the Latin Rite Catholic Mass. It accompanies the Asperges, the ritual at the beginning of Mass where the celebrant sprinkles the congregation with baptismal water.
It is sung from Easter Sunday throughout the liturgical season of Eastertide until the feast of Pentecost. It replaces the simpler antiphon Asperges me, which is used outside Eastertide.
TextTranslation
Vidi aquam egredientem de templo, a latere dextro, alleluia:
Et omnes ad quos pervenit aqua ista, salvi facti sunt,
Et dicent: alleluia, alleluia.

I saw water flowing out of the Temple, from its right side, Alleluia:
And all who came to this water were saved,
And they shall say: Alleluia, Alleluia.

The text refers to the words of the prophet Ezekiel, who saw the waters gushing forth from the Temple as a sanctifying flood that flows through the earth.