I always find it difficult to get the TIMING just right during the Sprinkling Rite.

Therefore, in the Vatican II Hymnal, I added verses that can be used if needed:

Instant PDF Download of Organ Accompaniment: "I Saw Water Flowing From The Temple" (New Translation by ICEL)

Vidi Aquam Sprinkling Rite during Eastertide Easter Easter Season (New Translation by ICEL)

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I saw water flowing from the Temple, from its right-hand side, alleluia:
and all to whom this water came were saved and shall say: Alleluia, alleluia.
Give praise to the Lord, for he is good : for his mercy endures for ever.
Let Israel now say, that he is good: that his mercy endures for ever.
Let the house of Aaron now say, that his mercy endures for ever.
Let them that fear the Lord now say, that his mercy endures for ever.
The Lord is my helper: I will not fear what man can do unto me.
The Lord is my helper: and I will look over my enemies.
It is good to confide in the Lord, rather than to have confidence in man.
It is good to trust in the Lord, rather than to trust in princes.
The Lord is my strength and my praise: and he has become my salvation.
The voice of rejoicing and of salvation is in the tabernacles of the just.
Glory be to the Father, and to the Son, and to the Holy Spirit.
As it was in the beginning, is now, and ever shall be, world without end. Amen.