If your city is being besieged by criminals and you need to protect your city the best way is with the Magnifcat.
This is kind of an antithesis of the story in the Old Testament of the fall of Jericho. For seven days they marched around the city, with seven priests at the head, and marched around the city seven times.
To protect your city you do something similar by saying the Magnifcat seven times.
My soul glorifies the Lord,
my spirit rejoices in God, my Saviour.
He looks on his servant in her lowliness;
henceforth all ages will call me blessed.
The Almighty works marvels for me.
Holy his name!
His mercy is from age to age,
on those who fear him.
He puts forth his arm in strength
and scatters the proud-hearted.
He casts the mighty from their thrones
and raises the lowly.
He fills the starving with good things,
sends the rich away empty.
He protects Israel, his servant,
remembering his mercy,
the mercy promised to our fathers,
to Abraham and his sons for ever.
Because everybody knows to protect your city from outlaws you need the Magnifcat 7.