The Agnus Dei Prayer
O my Lord Jesus Christ, the true Lamb that takest away the sins of the world! By Thy mercy, which is infinite, pardon my iniquities; and by Thy sacred passion preserve me this day from all sin and evil. I carry about me this holy Angus Dei in thy honor, as a preservative against my own weakness, and as an incentive to the practice of meekness, humility, and innocence, which thou hast taught. I offer myself up to thee as an entire oblation, and in memory of that sacrifice of love thou offered for me on The Cross, and in satisfaction for my sins. Accept, O my God, the oblation I make, and may it be agreeable to thee in the odor of sweetness. Amen.
Blessing for Water Supply
O Lord, Almighty God,who hast given us an ample supply of water,led off by pipes from this source,grant that,by Thy assistance and blessing and our cooperation,every diabolical attack and confusion may be kept off and that this water supply may always be pure and uncontaminated. Through Christ our Lord.
Amen.Saint Benedict Press - The Source for Catholic BiblesThis blessing below is done by a priest:
Blessing of Water
(On Sundays, or as the need arises, salt and clean water are prepared in the sacristy, and the priest, wearing a violet stole, says:)
V. Our help is in the name of the Lord.
R. Who has made heaven and earth.
(Then the priest continues:)
Salt made by God, I purge you of evil, by the living God, by the true God, by the holy God, by God who ordered by the mouth of the prophet Eliseus that you be mixed with water to heal the latter's sterility. Become now the salt of exorcism for the salvation of the faithful, that all tasting you may receive health of soul and body. From wherever you are sprinkled
let there flee away all appearance of devilish deceit, and wickedness and cunning. Let every unclean spirit be commanded by Him who is to come to judge the living and the dead and the world by fire.
Almighty and everlasting God, we humbly beg of Your measureless mercy to bless this salt that You have made and given mankind to use. Sanctify it in Your loving kindness, so that all who partake of it may receive health of both mind and body.
Grant that whatever is touched or sprinkled by it may be preserved from uncleanness, and from every assault of the wicked foe, through our Lord Jesus Christ.
(Exorcism of the water. The priest says:)
Water made by God, I purge you, too, of evil, in the name of God the Father almighty, in the name of Jesus Christ His Son our Lord, and in the power of the Holy Spirit. Become now water blessed to banish all power of the enemy, and to conquer and dispel that enemy himself with his fallen angels, by the power of the same Lord Jesus Christ, who shall come to judge the living and the dead and the world by fire.
Let us pray.
O God, for the salvation of mankind. You have built Your greatest sacraments on this substance of water. Give a kindly hearing to our prayers, and pour out the power of Your blessing on this element, now prepared for our many kinds of purifications. Grant that this, Your creature, may receive power by divine grace, in serving Your mysteries, to drive away evil spirits, and dispel diseases. Grant that everything in the homes or other buildings of the faithful that is sprinkled with this water
may be freed of all uncleanness, and be freed from harm.
Let no harmful spirit abide here, nor breath of corruption approach, and may all the snares of our hidden enemy vanish.
If there be anything which threatens either the health or the peace of those living there, may the sprinkling of this water put it to flight. Grant that the well-being sought by calling on Your holy name may be defended from all attacks, through Christ our Lord.
V. The Lord be with you.
R. And with your spirit.
Let us pray.
O God, You are the origin of unshakable power, the King of an unconquerable dynasty, and a ruler ever magnificent in triumphs. It is You that hold in check the forces of the hostile power, You that vanquish the rage of the roaring foe, You that scatter far and wide the snares of the enemy. Trembling and bowing before You, we ask of You and we beg, O Lord, that You behold with favor this mixture of salt and water, to regard it with kindness, and to bless it with the breath of Your tireless love. Grant that wherever it is sprinkled at the invocation of Your holy name, the attacks of the unclean spirit may be banished, and the fear of the fatal serpent be kept far away. Let the presence of the Holy Spirit within us, who humbly implore Your mercy, be everywhere granted, through our Lord Jesus Christ, Your Son, who lives and is King and God with You in the unity of the Holy Spirit for ever and ever.
(The faithful can take this Holy Water home in bottles, to sprinkle the sick, their homes, fields, vineyards, and so forth, to keep in their bedrooms, for sprinkling these every day.)