One of the most popular Catholic prayers is the prayer to St. Michael the Archangel. It is a prayer formulated in 1886 Pope Leo XIII, after he reported having a haunting demonic vision.
Here is how to pray the prayer to St. Michael the Archangel.
St. Michael the Archangel,
defend us in battle.
Be our defense against the wickedness and snares of the Devil.
May God rebuke him, we humbly pray,
and do thou,
O Prince of the heavenly hosts,
by the power of God,
thrust into hell Satan,
and all the evil spirits,
who prowl about the world
seeking the ruin of souls. Amen.