While the feast of Epiphany in the Roman Rite is primarily focused on the visit of the Magi, historically it was more focused on the baptism of Jesus Christ in the Jordan River. For this reason, there developed a special blessing of Epiphany water in memory of Jesus sanctifying the waters of Baptism.
This blessing of water on Epiphany was maintained by Eastern Catholics, but Roman Catholics also have an optional ceremony that was approved in 1890 that did homage to this tradition.
The emphasis of the blessing, however, was less on the commemoration of Jesus’ baptism and more on the symbolic nature of water as a cleansing agent. In this way, the blessing of Epiphany water in the Roman Rite was used to cast out Satan and all his demonic angels.
It is a powerful blessing, one that uses strong language to invoke the power of God over evil. It reminds us of the spiritual power of holy water and encourages us to use it in faith, trusting in the protecting help of God over our spiritual enemies. Here is an excerpt of the prayer, which is quite lengthy.
In the name of our Lord Jesus + Christ and by His power, we cast you out, every unclean spirit, every devilish power, every assault of the infernal adversary, every legion, every diabolical group and sect; begone and stay far from the Church of God, from all who are made in the image of God and redeemed by the precious blood of the divine + Lamb. Never again dare, you cunning serpent, to deceive the human race, to persecute the Church of God, nor to strike the chosen of God and to sift them as + wheat. For it is the Most High God who commands you, + He to whom you heretofore in your great pride considered yourself equal; He who desires that all men might be saved and come to the knowledge of truth. God the Father + commands you. God the Son + commands you. God the Holy + Spirit commands you. The majesty of Christ, the eternal Word of God made flesh + commands you…
Therefore, accursed dragon and every diabolical legion, we adjure you by the living + God, by the true + God, by the holy + God, by the God who so loved the world that He gave His only-begotten Son, that whoever believes in Him shall not perish but shall have life everlasting; cease your deception of the human race and your giving them to drink of the poison of everlasting damnation; desist from harming the Church and fettering her freedom. Begone Satan, you father and teacher of lies and enemy of mankind. Give place to Christ in whom you found none of your works; give place to the one, holy, Catholic, and apostolic Church, which Christ Himself purchased with His blood. May you be brought low under God’s mighty hand. May you tremble and flee as we call upon the holy and awesome name of Jesus, before whom hell quakes …
Pray this prayer when using holy water to bless yourself